diff --git a/CHANGELOG.md b/CHANGELOG.md
index d44007385..5b89eea03 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -127,6 +127,7 @@
     Feature #3983: Wizard: Add link to buy Morrowind
     Feature #4894: Consider actors as obstacles for pathfinding
     Feature #4899: Alpha-To-Coverage Anti-Aliasing for alpha testing
+    Feature #4917: Do not trigger NavMesh update when RecastMesh update should not change NavMesh
     Feature #4977: Use the "default icon.tga" when an item's icon is not found
     Feature #5043: Head Bobbing
     Feature #5199: OpenMW-CS: Improve scene view colors
diff --git a/apps/openmw_test_suite/detournavigator/navigator.cpp b/apps/openmw_test_suite/detournavigator/navigator.cpp
index d377aed1e..3b7dc4915 100644
--- a/apps/openmw_test_suite/detournavigator/navigator.cpp
+++ b/apps/openmw_test_suite/detournavigator/navigator.cpp
@@ -835,4 +835,55 @@ namespace
 
         ASSERT_THAT(result, Optional(Vec3fEq(mEnd.x(), mEnd.y(), 1.87719)));
     }
+
+    TEST_F(DetourNavigatorNavigatorTest, update_for_oscillating_object_that_does_not_change_navmesh_should_not_trigger_navmesh_update)
+    {
+        const std::array<btScalar, 5 * 5> heightfieldData {{
+            0,   0,    0,    0,    0,
+            0, -25,  -25,  -25,  -25,
+            0, -25, -100, -100, -100,
+            0, -25, -100, -100, -100,
+            0, -25, -100, -100, -100,
+        }};
+        btHeightfieldTerrainShape heightfieldShape = makeSquareHeightfieldTerrainShape(heightfieldData);
+        heightfieldShape.setLocalScaling(btVector3(128, 128, 1));
+
+        const btBoxShape oscillatingBoxShape(btVector3(20, 20, 20));
+        const btVector3 oscillatingBoxShapePosition(32, 32, 400);
+        const btBoxShape boderBoxShape(btVector3(50, 50, 50));
+
+        mNavigator->addAgent(mAgentHalfExtents);
+        mNavigator->addObject(ObjectId(&heightfieldShape), heightfieldShape, btTransform::getIdentity());
+        mNavigator->addObject(ObjectId(&oscillatingBoxShape), oscillatingBoxShape,
+                              btTransform(btMatrix3x3::getIdentity(), oscillatingBoxShapePosition));
+        // add this box to make navmesh bound box independent from oscillatingBoxShape rotations
+        mNavigator->addObject(ObjectId(&boderBoxShape), boderBoxShape,
+                              btTransform(btMatrix3x3::getIdentity(), oscillatingBoxShapePosition + btVector3(0, 0, 200)));
+        mNavigator->update(mPlayerPosition);
+        mNavigator->wait();
+
+        const auto navMeshes = mNavigator->getNavMeshes();
+        ASSERT_EQ(navMeshes.size(), 1);
+        {
+            const auto navMesh = navMeshes.begin()->second->lockConst();
+            ASSERT_EQ(navMesh->getGeneration(), 1);
+            ASSERT_EQ(navMesh->getNavMeshRevision(), 4);
+        }
+
+        for (int n = 0; n < 10; ++n)
+        {
+            const btTransform transform(btQuaternion(btVector3(0, 0, 1), n * 2 * osg::PI / 10),
+                                        oscillatingBoxShapePosition);
+            mNavigator->updateObject(ObjectId(&oscillatingBoxShape), oscillatingBoxShape, transform);
+            mNavigator->update(mPlayerPosition);
+            mNavigator->wait();
+        }
+
+        ASSERT_EQ(navMeshes.size(), 1);
+        {
+            const auto navMesh = navMeshes.begin()->second->lockConst();
+            ASSERT_EQ(navMesh->getGeneration(), 1);
+            ASSERT_EQ(navMesh->getNavMeshRevision(), 4);
+        }
+    }
 }
diff --git a/components/CMakeLists.txt b/components/CMakeLists.txt
index ad2783b57..2fe09070a 100644
--- a/components/CMakeLists.txt
+++ b/components/CMakeLists.txt
@@ -182,6 +182,8 @@ add_component_dir(detournavigator
     navigator
     findrandompointaroundcircle
     raycast
+    navmeshtileview
+    oscillatingrecastmeshobject
     )
 
 set (ESM_UI ${CMAKE_SOURCE_DIR}/files/ui/contentselector.ui
diff --git a/components/bullethelpers/aabb.hpp b/components/bullethelpers/aabb.hpp
new file mode 100644
index 000000000..6509b946c
--- /dev/null
+++ b/components/bullethelpers/aabb.hpp
@@ -0,0 +1,29 @@
+#ifndef OPENMW_COMPONENTS_BULLETHELPERS_AABB_H
+#define OPENMW_COMPONENTS_BULLETHELPERS_AABB_H
+
+#include <LinearMath/btVector3.h>
+#include <LinearMath/btTransform.h>
+#include <BulletCollision/CollisionShapes/btCollisionShape.h>
+#include <BulletCollision/Gimpact/btBoxCollision.h>
+
+inline bool operator==(const btAABB& lhs, const btAABB& rhs)
+{
+    return lhs.m_min == rhs.m_min && lhs.m_max == rhs.m_max;
+}
+
+inline bool operator!=(const btAABB& lhs, const btAABB& rhs)
+{
+    return !(lhs == rhs);
+}
+
+namespace BulletHelpers
+{
+    inline btAABB getAabb(const btCollisionShape& shape, const btTransform& transform)
+    {
+        btAABB result;
+        shape.getAabb(transform, result.m_min, result.m_max);
+        return result;
+    }
+}
+
+#endif
diff --git a/components/detournavigator/asyncnavmeshupdater.cpp b/components/detournavigator/asyncnavmeshupdater.cpp
index bb78df764..4855cf0ad 100644
--- a/components/detournavigator/asyncnavmeshupdater.cpp
+++ b/components/detournavigator/asyncnavmeshupdater.cpp
@@ -2,6 +2,7 @@
 #include "debug.hpp"
 #include "makenavmesh.hpp"
 #include "settings.hpp"
+#include "version.hpp"
 
 #include <components/debug/debuglog.hpp>
 #include <components/misc/thread.hpp>
@@ -180,6 +181,19 @@ namespace DetourNavigator
         const auto status = updateNavMesh(job.mAgentHalfExtents, recastMesh.get(), job.mChangedTile, playerTile,
             offMeshConnections, mSettings, navMeshCacheItem, mNavMeshTilesCache);
 
+        if (recastMesh != nullptr)
+        {
+            Version navMeshVersion;
+            {
+                const auto locked = navMeshCacheItem->lockConst();
+                navMeshVersion.mGeneration = locked->getGeneration();
+                navMeshVersion.mRevision = locked->getNavMeshRevision();
+            }
+            mRecastMeshManager.get().reportNavMeshChange(job.mChangedTile,
+                Version {recastMesh->getGeneration(), recastMesh->getRevision()},
+                navMeshVersion);
+        }
+
         const auto finish = std::chrono::steady_clock::now();
 
         writeDebugFiles(job, recastMesh.get());
diff --git a/components/detournavigator/cachedrecastmeshmanager.cpp b/components/detournavigator/cachedrecastmeshmanager.cpp
index 90b426610..22b047fbd 100644
--- a/components/detournavigator/cachedrecastmeshmanager.cpp
+++ b/components/detournavigator/cachedrecastmeshmanager.cpp
@@ -61,4 +61,9 @@ namespace DetourNavigator
     {
         return mImpl.isEmpty();
     }
+
+    void CachedRecastMeshManager::reportNavMeshChange(Version recastMeshVersion, Version navMeshVersion)
+    {
+        mImpl.reportNavMeshChange(recastMeshVersion, navMeshVersion);
+    }
 }
diff --git a/components/detournavigator/cachedrecastmeshmanager.hpp b/components/detournavigator/cachedrecastmeshmanager.hpp
index 54574aa99..a19f017a4 100644
--- a/components/detournavigator/cachedrecastmeshmanager.hpp
+++ b/components/detournavigator/cachedrecastmeshmanager.hpp
@@ -2,6 +2,7 @@
 #define OPENMW_COMPONENTS_DETOURNAVIGATOR_CACHEDRECASTMESHMANAGER_H
 
 #include "recastmeshmanager.hpp"
+#include "version.hpp"
 
 namespace DetourNavigator
 {
@@ -25,6 +26,8 @@ namespace DetourNavigator
 
         bool isEmpty() const;
 
+        void reportNavMeshChange(Version recastMeshVersion, Version navMeshVersion);
+
     private:
         RecastMeshManager mImpl;
         std::shared_ptr<RecastMesh> mCached;
diff --git a/components/detournavigator/navmeshcacheitem.hpp b/components/detournavigator/navmeshcacheitem.hpp
index 76f74f266..a9a4ebee6 100644
--- a/components/detournavigator/navmeshcacheitem.hpp
+++ b/components/detournavigator/navmeshcacheitem.hpp
@@ -5,6 +5,7 @@
 #include "tileposition.hpp"
 #include "navmeshtilescache.hpp"
 #include "dtstatus.hpp"
+#include "navmeshtileview.hpp"
 
 #include <components/misc/guarded.hpp>
 
@@ -141,6 +142,12 @@ namespace DetourNavigator
         template <class T>
         UpdateNavMeshStatus updateTile(const TilePosition& position, T&& navMeshData)
         {
+            const dtMeshTile* currentTile = getTile(position);
+            if (currentTile != nullptr
+                && asNavMeshTileConstView(*currentTile) == asNavMeshTileConstView(getRawData(navMeshData)))
+            {
+                return UpdateNavMeshStatus::ignored;
+            }
             const auto removed = removeTileImpl(position);
             const auto addStatus = addTileImpl(getRawData(navMeshData), getSize(navMeshData));
             if (dtStatusSucceed(addStatus))
@@ -206,6 +213,12 @@ namespace DetourNavigator
             int* const dataSize = nullptr;
             return dtStatusSucceed(mImpl->removeTile(tileRef, data, dataSize));
         }
+
+        const dtMeshTile* getTile(const TilePosition& position) const
+        {
+            const int layer = 0;
+            return mImpl->getTileAt(position.x(), position.y(), layer);
+        }
     };
 
     using GuardedNavMeshCacheItem = Misc::ScopeGuarded<NavMeshCacheItem>;
diff --git a/components/detournavigator/navmeshtileview.cpp b/components/detournavigator/navmeshtileview.cpp
new file mode 100644
index 000000000..96f07c6b1
--- /dev/null
+++ b/components/detournavigator/navmeshtileview.cpp
@@ -0,0 +1,183 @@
+#include "navmeshtileview.hpp"
+
+#include <DetourCommon.h>
+#include <DetourNavMesh.h>
+
+#include <algorithm>
+#include <cassert>
+#include <stdexcept>
+#include <tuple>
+
+namespace
+{
+    template <typename T>
+    struct Ref
+    {
+        T& mRef;
+
+        explicit Ref(T& ref) : mRef(ref) {}
+
+        friend bool operator==(const Ref& lhs, const Ref& rhs)
+        {
+            return lhs.mRef == rhs.mRef;
+        }
+    };
+
+    template <typename T, std::size_t size>
+    struct ArrayRef
+    {
+        T (&mRef)[size];
+
+        explicit ArrayRef(T (&ref)[size]) : mRef(ref) {}
+
+        friend bool operator==(const ArrayRef& lhs, const ArrayRef& rhs)
+        {
+            return std::equal(std::begin(lhs.mRef), std::end(lhs.mRef), std::begin(rhs.mRef));
+        }
+    };
+
+    template <typename T>
+    struct Span
+    {
+        T* mBegin;
+        T* mEnd;
+
+        explicit Span(T* data, int size) : mBegin(data), mEnd(data + static_cast<std::size_t>(size)) {}
+
+        friend bool operator==(const Span& lhs, const Span& rhs)
+        {
+            // size is already equal if headers are equal
+            assert((lhs.mEnd - lhs.mBegin) == (rhs.mEnd - rhs.mBegin));
+            return std::equal(lhs.mBegin, lhs.mEnd, rhs.mBegin);
+        }
+    };
+
+    auto makeTuple(const dtMeshHeader& v)
+    {
+        return std::tuple(
+            v.x,
+            v.y,
+            v.layer,
+            v.userId,
+            v.polyCount,
+            v.vertCount,
+            v.maxLinkCount,
+            v.detailMeshCount,
+            v.detailVertCount,
+            v.detailTriCount,
+            v.bvNodeCount,
+            v.offMeshConCount,
+            v.offMeshBase,
+            v.walkableHeight,
+            v.walkableRadius,
+            v.walkableClimb,
+            v.detailVertCount,
+            ArrayRef(v.bmin),
+            ArrayRef(v.bmax),
+            v.bvQuantFactor
+        );
+    }
+
+    auto makeTuple(const dtPoly& v)
+    {
+        return std::tuple(ArrayRef(v.verts), ArrayRef(v.neis), v.flags, v.vertCount, v.areaAndtype);
+    }
+
+    auto makeTuple(const dtPolyDetail& v)
+    {
+        return std::tuple(v.vertBase, v.triBase, v.vertCount, v.triCount);
+    }
+
+    auto makeTuple(const dtBVNode& v)
+    {
+        return std::tuple(ArrayRef(v.bmin), ArrayRef(v.bmax), v.i);
+    }
+
+    auto makeTuple(const dtOffMeshConnection& v)
+    {
+        return std::tuple(ArrayRef(v.pos), v.rad, v.poly, v.flags, v.side, v.userId);
+    }
+
+    auto makeTuple(const DetourNavigator::NavMeshTileConstView& v)
+    {
+        return std::tuple(
+            Ref(*v.mHeader),
+            Span(v.mPolys, v.mHeader->polyCount),
+            Span(v.mVerts, v.mHeader->vertCount),
+            Span(v.mDetailMeshes, v.mHeader->detailMeshCount),
+            Span(v.mDetailVerts, v.mHeader->detailVertCount),
+            Span(v.mDetailTris, v.mHeader->detailTriCount),
+            Span(v.mBvTree, v.mHeader->bvNodeCount),
+            Span(v.mOffMeshCons, v.mHeader->offMeshConCount)
+        );
+    }
+}
+
+template <class T>
+inline auto operator==(const T& lhs, const T& rhs)
+    -> std::enable_if_t<std::is_same_v<std::void_t<decltype(makeTuple(lhs))>, void>, bool>
+{
+    return makeTuple(lhs) == makeTuple(rhs);
+}
+
+namespace DetourNavigator
+{
+    NavMeshTileConstView asNavMeshTileConstView(const unsigned char* data)
+    {
+        const dtMeshHeader* header = reinterpret_cast<const dtMeshHeader*>(data);
+
+        if (header->magic != DT_NAVMESH_MAGIC)
+            throw std::logic_error("Invalid navmesh magic");
+
+        if (header->version != DT_NAVMESH_VERSION)
+            throw std::logic_error("Invalid navmesh version");
+
+        // Similar code to https://github.com/recastnavigation/recastnavigation/blob/c5cbd53024c8a9d8d097a4371215e3342d2fdc87/Detour/Source/DetourNavMesh.cpp#L978-L996
+        const int headerSize = dtAlign4(sizeof(dtMeshHeader));
+        const int vertsSize = dtAlign4(sizeof(float) * 3 * header->vertCount);
+        const int polysSize = dtAlign4(sizeof(dtPoly) * header->polyCount);
+        const int linksSize = dtAlign4(sizeof(dtLink) * (header->maxLinkCount));
+        const int detailMeshesSize = dtAlign4(sizeof(dtPolyDetail) * header->detailMeshCount);
+        const int detailVertsSize = dtAlign4(sizeof(float) * 3 * header->detailVertCount);
+        const int detailTrisSize = dtAlign4(sizeof(unsigned char) * 4 * header->detailTriCount);
+        const int bvtreeSize = dtAlign4(sizeof(dtBVNode) * header->bvNodeCount);
+        const int offMeshLinksSize = dtAlign4(sizeof(dtOffMeshConnection) * header->offMeshConCount);
+
+        const unsigned char* ptr = data + headerSize;
+
+        NavMeshTileConstView view;
+
+        view.mHeader = header;
+        view.mVerts = dtGetThenAdvanceBufferPointer<const float>(ptr, vertsSize);
+        view.mPolys = dtGetThenAdvanceBufferPointer<const dtPoly>(ptr, polysSize);
+        ptr += linksSize;
+        view.mDetailMeshes = dtGetThenAdvanceBufferPointer<const dtPolyDetail>(ptr, detailMeshesSize);
+        view.mDetailVerts = dtGetThenAdvanceBufferPointer<const float>(ptr, detailVertsSize);
+        view.mDetailTris = dtGetThenAdvanceBufferPointer<const unsigned char>(ptr, detailTrisSize);
+        view.mBvTree = dtGetThenAdvanceBufferPointer<const dtBVNode>(ptr, bvtreeSize);
+        view.mOffMeshCons = dtGetThenAdvanceBufferPointer<const dtOffMeshConnection>(ptr, offMeshLinksSize);
+
+        return view;
+    }
+
+    NavMeshTileConstView asNavMeshTileConstView(const dtMeshTile& tile)
+    {
+        NavMeshTileConstView view;
+
+        view.mHeader = tile.header;
+        view.mPolys = tile.polys;
+        view.mVerts = tile.verts;
+        view.mDetailMeshes = tile.detailMeshes;
+        view.mDetailVerts = tile.detailVerts;
+        view.mDetailTris = tile.detailTris;
+        view.mBvTree = tile.bvTree;
+        view.mOffMeshCons = tile.offMeshCons;
+
+        return view;
+    }
+
+    bool operator==(const NavMeshTileConstView& lhs, const NavMeshTileConstView& rhs)
+    {
+        return makeTuple(lhs) == makeTuple(rhs);
+    }
+}
diff --git a/components/detournavigator/navmeshtileview.hpp b/components/detournavigator/navmeshtileview.hpp
new file mode 100644
index 000000000..92017360c
--- /dev/null
+++ b/components/detournavigator/navmeshtileview.hpp
@@ -0,0 +1,31 @@
+#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_NAVMESHTILEVIEW_H
+#define OPENMW_COMPONENTS_DETOURNAVIGATOR_NAVMESHTILEVIEW_H
+
+struct dtMeshHeader;
+struct dtPoly;
+struct dtPolyDetail;
+struct dtBVNode;
+struct dtOffMeshConnection;
+struct dtMeshTile;
+
+namespace DetourNavigator
+{
+    struct NavMeshTileConstView
+    {
+        const dtMeshHeader* mHeader;
+        const dtPoly* mPolys;
+        const float* mVerts;
+        const dtPolyDetail* mDetailMeshes;
+        const float* mDetailVerts;
+        const unsigned char* mDetailTris;
+        const dtBVNode* mBvTree;
+        const dtOffMeshConnection* mOffMeshCons;
+
+        friend bool operator==(const NavMeshTileConstView& lhs, const NavMeshTileConstView& rhs);
+    };
+
+    NavMeshTileConstView asNavMeshTileConstView(const unsigned char* data);
+    NavMeshTileConstView asNavMeshTileConstView(const dtMeshTile& tile);
+}
+
+#endif
diff --git a/components/detournavigator/oscillatingrecastmeshobject.cpp b/components/detournavigator/oscillatingrecastmeshobject.cpp
new file mode 100644
index 000000000..dd0b95600
--- /dev/null
+++ b/components/detournavigator/oscillatingrecastmeshobject.cpp
@@ -0,0 +1,35 @@
+#include "oscillatingrecastmeshobject.hpp"
+
+#include <components/bullethelpers/aabb.hpp>
+
+namespace DetourNavigator
+{
+    OscillatingRecastMeshObject::OscillatingRecastMeshObject(RecastMeshObject impl, std::size_t lastChangeRevision)
+        : mImpl(std::move(impl))
+        , mLastChangeRevision(lastChangeRevision)
+        , mAabb(BulletHelpers::getAabb(mImpl.getShape(), mImpl.getTransform()))
+    {
+    }
+
+    bool OscillatingRecastMeshObject::update(const btTransform& transform, const AreaType areaType,
+                                             std::size_t lastChangeRevision)
+    {
+        const btTransform oldTransform = mImpl.getTransform();
+        if (!mImpl.update(transform, areaType))
+            return false;
+        if (transform == oldTransform)
+            return true;
+        if (mLastChangeRevision != lastChangeRevision)
+        {
+            mLastChangeRevision = lastChangeRevision;
+            // btAABB doesn't have copy-assignment operator
+            const btAABB aabb = BulletHelpers::getAabb(mImpl.getShape(), transform);
+            mAabb.m_min = aabb.m_min;
+            mAabb.m_max = aabb.m_max;
+            return true;
+        }
+        const btAABB currentAabb = mAabb;
+        mAabb.merge(BulletHelpers::getAabb(mImpl.getShape(), transform));
+        return currentAabb != mAabb;
+    }
+}
diff --git a/components/detournavigator/oscillatingrecastmeshobject.hpp b/components/detournavigator/oscillatingrecastmeshobject.hpp
new file mode 100644
index 000000000..476fd4e0d
--- /dev/null
+++ b/components/detournavigator/oscillatingrecastmeshobject.hpp
@@ -0,0 +1,28 @@
+#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_OSCILLATINGRECASTMESHOBJECT_H
+#define OPENMW_COMPONENTS_DETOURNAVIGATOR_OSCILLATINGRECASTMESHOBJECT_H
+
+#include "areatype.hpp"
+#include "recastmeshobject.hpp"
+
+#include <LinearMath/btTransform.h>
+#include <BulletCollision/Gimpact/btBoxCollision.h>
+
+namespace DetourNavigator
+{
+    class OscillatingRecastMeshObject
+    {
+        public:
+            explicit OscillatingRecastMeshObject(RecastMeshObject impl, std::size_t lastChangeRevision);
+
+            bool update(const btTransform& transform, const AreaType areaType, std::size_t lastChangeRevision);
+
+            const RecastMeshObject& getImpl() const { return mImpl; }
+
+        private:
+            RecastMeshObject mImpl;
+            std::size_t mLastChangeRevision;
+            btAABB mAabb;
+    };
+}
+
+#endif
diff --git a/components/detournavigator/recastmeshmanager.cpp b/components/detournavigator/recastmeshmanager.cpp
index 3796c9816..146038ae6 100644
--- a/components/detournavigator/recastmeshmanager.cpp
+++ b/components/detournavigator/recastmeshmanager.cpp
@@ -13,7 +13,8 @@ namespace DetourNavigator
     bool RecastMeshManager::addObject(const ObjectId id, const btCollisionShape& shape, const btTransform& transform,
                                       const AreaType areaType)
     {
-        const auto iterator = mObjectsOrder.emplace(mObjectsOrder.end(), RecastMeshObject(shape, transform, areaType));
+        const auto iterator = mObjectsOrder.emplace(mObjectsOrder.end(),
+            OscillatingRecastMeshObject(RecastMeshObject(shape, transform, areaType), mRevision + 1));
         if (!mObjects.emplace(id, iterator).second)
         {
             mObjectsOrder.erase(iterator);
@@ -28,7 +29,9 @@ namespace DetourNavigator
         const auto object = mObjects.find(id);
         if (object == mObjects.end())
             return false;
-        if (!object->second->update(transform, areaType))
+        const std::size_t lastChangeRevision = mLastNavMeshReportedChange.has_value()
+                ? mLastNavMeshReportedChange->mRevision : mRevision;
+        if (!object->second->update(transform, areaType, lastChangeRevision))
             return false;
         ++mRevision;
         return true;
@@ -39,7 +42,7 @@ namespace DetourNavigator
         const auto object = mObjects.find(id);
         if (object == mObjects.end())
             return std::nullopt;
-        const RemovedRecastMeshObject result {object->second->getShape(), object->second->getTransform()};
+        const RemovedRecastMeshObject result {object->second->getImpl().getShape(), object->second->getImpl().getTransform()};
         mObjectsOrder.erase(object->second);
         mObjects.erase(object);
         ++mRevision;
@@ -74,7 +77,7 @@ namespace DetourNavigator
     std::shared_ptr<RecastMesh> RecastMeshManager::getMesh()
     {
         rebuild();
-        return mMeshBuilder.create(mGeneration, mLastBuildRevision);
+        return mMeshBuilder.create(mGeneration, mRevision);
     }
 
     bool RecastMeshManager::isEmpty() const
@@ -82,15 +85,27 @@ namespace DetourNavigator
         return mObjects.empty();
     }
 
+    void RecastMeshManager::reportNavMeshChange(Version recastMeshVersion, Version navMeshVersion)
+    {
+        if (recastMeshVersion.mGeneration != mGeneration)
+            return;
+        if (mLastNavMeshReport.has_value() && navMeshVersion < mLastNavMeshReport->mNavMeshVersion)
+            return;
+        mLastNavMeshReport = {recastMeshVersion.mRevision, navMeshVersion};
+        if (!mLastNavMeshReportedChange.has_value()
+                || mLastNavMeshReportedChange->mNavMeshVersion < mLastNavMeshReport->mNavMeshVersion)
+            mLastNavMeshReportedChange = mLastNavMeshReport;
+    }
+
     void RecastMeshManager::rebuild()
     {
-        if (mLastBuildRevision == mRevision)
-            return;
         mMeshBuilder.reset();
         for (const auto& v : mWaterOrder)
             mMeshBuilder.addWater(v.mCellSize, v.mTransform);
-        for (const auto& v : mObjectsOrder)
+        for (const auto& object : mObjectsOrder)
+        {
+            const RecastMeshObject& v = object.getImpl();
             mMeshBuilder.addObject(v.getShape(), v.getTransform(), v.getAreaType());
-        mLastBuildRevision = mRevision;
+        }
     }
 }
diff --git a/components/detournavigator/recastmeshmanager.hpp b/components/detournavigator/recastmeshmanager.hpp
index 5b568e004..daa123fcb 100644
--- a/components/detournavigator/recastmeshmanager.hpp
+++ b/components/detournavigator/recastmeshmanager.hpp
@@ -2,8 +2,9 @@
 #define OPENMW_COMPONENTS_DETOURNAVIGATOR_RECASTMESHMANAGER_H
 
 #include "recastmeshbuilder.hpp"
-#include "recastmeshobject.hpp"
+#include "oscillatingrecastmeshobject.hpp"
 #include "objectid.hpp"
+#include "version.hpp"
 
 #include <LinearMath/btTransform.h>
 
@@ -50,15 +51,24 @@ namespace DetourNavigator
 
         bool isEmpty() const;
 
+        void reportNavMeshChange(Version recastMeshVersion, Version navMeshVersion);
+
     private:
+        struct Report
+        {
+            std::size_t mRevision;
+            Version mNavMeshVersion;
+        };
+
         std::size_t mRevision = 0;
-        std::size_t mLastBuildRevision = 0;
         std::size_t mGeneration;
         RecastMeshBuilder mMeshBuilder;
-        std::list<RecastMeshObject> mObjectsOrder;
-        std::unordered_map<ObjectId, std::list<RecastMeshObject>::iterator> mObjects;
+        std::list<OscillatingRecastMeshObject> mObjectsOrder;
+        std::unordered_map<ObjectId, std::list<OscillatingRecastMeshObject>::iterator> mObjects;
         std::list<Water> mWaterOrder;
         std::map<osg::Vec2i, std::list<Water>::iterator> mWater;
+        std::optional<Report> mLastNavMeshReportedChange;
+        std::optional<Report> mLastNavMeshReport;
 
         void rebuild();
     };
diff --git a/components/detournavigator/recastmeshobject.cpp b/components/detournavigator/recastmeshobject.cpp
index aac0b4c3c..3f3546278 100644
--- a/components/detournavigator/recastmeshobject.cpp
+++ b/components/detournavigator/recastmeshobject.cpp
@@ -8,6 +8,22 @@
 
 namespace DetourNavigator
 {
+    namespace
+    {
+        bool updateCompoundObject(const btCompoundShape& shape, const AreaType areaType,
+            std::vector<RecastMeshObject>& children)
+        {
+            assert(static_cast<std::size_t>(shape.getNumChildShapes()) == children.size());
+            bool result = false;
+            for (int i = 0, num = shape.getNumChildShapes(); i < num; ++i)
+            {
+                assert(shape.getChildShape(i) == std::addressof(children[static_cast<std::size_t>(i)].getShape()));
+                result = children[static_cast<std::size_t>(i)].update(shape.getChildTransform(i), areaType) || result;
+            }
+            return result;
+        }
+    }
+
     RecastMeshObject::RecastMeshObject(const btCollisionShape& shape, const btTransform& transform,
             const AreaType areaType)
         : mShape(shape)
@@ -42,19 +58,6 @@ namespace DetourNavigator
         return result;
     }
 
-    bool RecastMeshObject::updateCompoundObject(const btCompoundShape& shape,
-        const AreaType areaType, std::vector<RecastMeshObject>& children)
-    {
-        assert(static_cast<std::size_t>(shape.getNumChildShapes()) == children.size());
-        bool result = false;
-        for (int i = 0, num = shape.getNumChildShapes(); i < num; ++i)
-        {
-            assert(shape.getChildShape(i) == std::addressof(children[static_cast<std::size_t>(i)].mShape.get()));
-            result = children[static_cast<std::size_t>(i)].update(shape.getChildTransform(i), areaType) || result;
-        }
-        return result;
-    }
-
     std::vector<RecastMeshObject> makeChildrenObjects(const btCollisionShape& shape, const AreaType areaType)
     {
         if (shape.isCompound())
diff --git a/components/detournavigator/recastmeshobject.hpp b/components/detournavigator/recastmeshobject.hpp
index f25647ae5..e659300e6 100644
--- a/components/detournavigator/recastmeshobject.hpp
+++ b/components/detournavigator/recastmeshobject.hpp
@@ -41,9 +41,6 @@ namespace DetourNavigator
             AreaType mAreaType;
             btVector3 mLocalScaling;
             std::vector<RecastMeshObject> mChildren;
-
-            static bool updateCompoundObject(const btCompoundShape& shape, const AreaType areaType,
-                std::vector<RecastMeshObject>& children);
     };
 
     std::vector<RecastMeshObject> makeChildrenObjects(const btCollisionShape& shape, const AreaType areaType);
diff --git a/components/detournavigator/tilecachedrecastmeshmanager.cpp b/components/detournavigator/tilecachedrecastmeshmanager.cpp
index fddaa88f1..20ebc8fea 100644
--- a/components/detournavigator/tilecachedrecastmeshmanager.cpp
+++ b/components/detournavigator/tilecachedrecastmeshmanager.cpp
@@ -145,6 +145,15 @@ namespace DetourNavigator
         return mRevision;
     }
 
+    void TileCachedRecastMeshManager::reportNavMeshChange(const TilePosition& tilePosition, Version recastMeshVersion, Version navMeshVersion)
+    {
+        const auto tiles = mTiles.lock();
+        const auto it = tiles->find(tilePosition);
+        if (it == tiles->end())
+            return;
+        it->second.reportNavMeshChange(recastMeshVersion, navMeshVersion);
+    }
+
     bool TileCachedRecastMeshManager::addTile(const ObjectId id, const btCollisionShape& shape,
         const btTransform& transform, const AreaType areaType, const TilePosition& tilePosition, float border,
         std::map<TilePosition, CachedRecastMeshManager>& tiles)
diff --git a/components/detournavigator/tilecachedrecastmeshmanager.hpp b/components/detournavigator/tilecachedrecastmeshmanager.hpp
index fa192bd73..68683f410 100644
--- a/components/detournavigator/tilecachedrecastmeshmanager.hpp
+++ b/components/detournavigator/tilecachedrecastmeshmanager.hpp
@@ -5,6 +5,7 @@
 #include "tileposition.hpp"
 #include "settingsutils.hpp"
 #include "gettilespositions.hpp"
+#include "version.hpp"
 
 #include <components/misc/guarded.hpp>
 
@@ -88,6 +89,8 @@ namespace DetourNavigator
 
         std::size_t getRevision() const;
 
+        void reportNavMeshChange(const TilePosition& tilePosition, Version recastMeshVersion, Version navMeshVersion);
+
     private:
         const Settings& mSettings;
         Misc::ScopeGuarded<std::map<TilePosition, CachedRecastMeshManager>> mTiles;
diff --git a/components/detournavigator/version.hpp b/components/detournavigator/version.hpp
new file mode 100644
index 000000000..c9de98459
--- /dev/null
+++ b/components/detournavigator/version.hpp
@@ -0,0 +1,21 @@
+#ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_VERSION_H
+#define OPENMW_COMPONENTS_DETOURNAVIGATOR_VERSION_H
+
+#include <cstddef>
+#include <tuple>
+
+namespace DetourNavigator
+{
+    struct Version
+    {
+        std::size_t mGeneration;
+        std::size_t mRevision;
+
+        friend inline bool operator<(const Version& lhs, const Version& rhs)
+        {
+            return std::tie(lhs.mGeneration, lhs.mRevision) < std::tie(rhs.mGeneration, rhs.mRevision);
+        }
+    };
+}
+
+#endif