diff --git a/CHANGELOG.md b/CHANGELOG.md
index b6d95cd0d..8af60aa9c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -82,6 +82,7 @@
     Bug #4984: "Friendly hits" feature should be used only for player's followers
     Bug #4989: Object dimension-dependent VFX scaling behavior is inconsistent
     Bug #4990: Dead bodies prevent you from hitting
+    Bug #4999: Drop instruction behaves differently from vanilla
     Bug #5004: Werewolves shield their eyes during storm
     Feature #1774: Handle AvoidNode
     Feature #2229: Improve pathfinding AI
diff --git a/apps/openmw/mwscript/miscextensions.cpp b/apps/openmw/mwscript/miscextensions.cpp
index d73fbbe35..b64609c95 100644
--- a/apps/openmw/mwscript/miscextensions.cpp
+++ b/apps/openmw/mwscript/miscextensions.cpp
@@ -15,6 +15,7 @@
 #include "../mwbase/environment.hpp"
 #include "../mwbase/windowmanager.hpp"
 #include "../mwbase/scriptmanager.hpp"
+#include "../mwbase/soundmanager.hpp"
 #include "../mwbase/world.hpp"
 
 #include "../mwworld/class.hpp"
@@ -23,6 +24,7 @@
 #include "../mwworld/inventorystore.hpp"
 #include "../mwworld/esmstore.hpp"
 #include "../mwworld/cellstore.hpp"
+#include "../mwworld/manualref.hpp"
 
 #include "../mwmechanics/aicast.hpp"
 #include "../mwmechanics/npcstats.hpp"
@@ -469,6 +471,9 @@ namespace MWScript
                     std::string gem = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
 
+                    if (!ptr.getClass().hasInventoryStore(ptr))
+                        return;
+
                     const MWWorld::ESMStore& store = MWBase::Environment::get().getWorld()->getStore();
                     store.get<ESM::Creature>().find(creature); // This line throws an exception if it can't find the creature
 
@@ -499,7 +504,10 @@ namespace MWScript
                     for (unsigned int i=0; i<arg0; ++i)
                         runtime.pop();
 
-                    MWWorld::ContainerStore& store = ptr.getClass().getContainerStore (ptr);
+                    if (!ptr.getClass().hasInventoryStore(ptr))
+                        return;
+
+                    MWWorld::InventoryStore& store = ptr.getClass().getInventoryStore(ptr);
                     for (MWWorld::ContainerStoreIterator it = store.begin(); it != store.end(); ++it)
                     {
                         if (::Misc::StringUtils::ciEqual(it->getCellRef().getSoul(), soul))
@@ -534,16 +542,18 @@ namespace MWScript
                     if (amount == 0)
                         return;
 
-                    // Prefer dropping unequipped items first; re-stack if possible by unequipping items before dropping them.
-                    MWWorld::InventoryStore *invStorePtr = 0;
-                    if (ptr.getClass().hasInventoryStore(ptr)) {
-                        invStorePtr = &ptr.getClass().getInventoryStore(ptr);
+                    if (!ptr.getClass().isActor())
+                        return;
 
-                        int numNotEquipped = invStorePtr->count(item);
+                    if (ptr.getClass().hasInventoryStore(ptr))
+                    {
+                        // Prefer dropping unequipped items first; re-stack if possible by unequipping items before dropping them.
+                        MWWorld::InventoryStore& store = ptr.getClass().getInventoryStore(ptr);
+                        int numNotEquipped = store.count(item);
                         for (int slot = 0; slot < MWWorld::InventoryStore::Slots; ++slot)
                         {
-                            MWWorld::ConstContainerStoreIterator it = invStorePtr->getSlot (slot);
-                            if (it != invStorePtr->end() && ::Misc::StringUtils::ciEqual(it->getCellRef().getRefId(), item))
+                            MWWorld::ConstContainerStoreIterator it = store.getSlot (slot);
+                            if (it != store.end() && ::Misc::StringUtils::ciEqual(it->getCellRef().getRefId(), item))
                             {
                                 numNotEquipped -= it->getRefData().getCount();
                             }
@@ -551,37 +561,48 @@ namespace MWScript
 
                         for (int slot = 0; slot < MWWorld::InventoryStore::Slots && amount > numNotEquipped; ++slot)
                         {
-                            MWWorld::ContainerStoreIterator it = invStorePtr->getSlot (slot);
-                            if (it != invStorePtr->end() && ::Misc::StringUtils::ciEqual(it->getCellRef().getRefId(), item))
+                            MWWorld::ContainerStoreIterator it = store.getSlot (slot);
+                            if (it != store.end() && ::Misc::StringUtils::ciEqual(it->getCellRef().getRefId(), item))
                             {
-                                int numToRemove = it->getRefData().getCount();
-                                if (numToRemove > amount - numNotEquipped)
-                                {
-                                    numToRemove = amount - numNotEquipped;
-                                }
-                                invStorePtr->unequipItemQuantity(*it, ptr, numToRemove);
+                                int numToRemove = std::min(amount - numNotEquipped, it->getRefData().getCount());
+                                store.unequipItemQuantity(*it, ptr, numToRemove);
                                 numNotEquipped += numToRemove;
                             }
                         }
-                    }
 
-                    int toRemove = amount;
-                    MWWorld::ContainerStore& store = ptr.getClass().getContainerStore (ptr);
-                    for (MWWorld::ContainerStoreIterator iter (store.begin()); iter!=store.end(); ++iter)
-                    {
-                        if (::Misc::StringUtils::ciEqual(iter->getCellRef().getRefId(), item)
-                                && (!invStorePtr || !invStorePtr->isEquipped(*iter)))
+                        for (MWWorld::ContainerStoreIterator iter (store.begin()); iter!=store.end(); ++iter)
                         {
-                            int removed = store.remove(*iter, toRemove, ptr);
-                            MWWorld::Ptr dropped = MWBase::Environment::get().getWorld()->dropObjectOnGround(ptr, *iter, removed);
-                            dropped.getCellRef().setOwner("");
+                            if (::Misc::StringUtils::ciEqual(iter->getCellRef().getRefId(), item) && !store.isEquipped(*iter))
+                            {
+                                int removed = store.remove(*iter, amount, ptr);
+                                MWWorld::Ptr dropped = MWBase::Environment::get().getWorld()->dropObjectOnGround(ptr, *iter, removed);
+                                dropped.getCellRef().setOwner("");
 
-                            toRemove -= removed;
+                                amount -= removed;
 
-                            if (toRemove <= 0)
-                                break;
+                                if (amount <= 0)
+                                    break;
+                            }
+                        }
+                    }
+
+                    MWWorld::ManualRef ref(MWBase::Environment::get().getWorld()->getStore(), item, 1);
+                    MWWorld::Ptr itemPtr(ref.getPtr());
+                    if (amount > 0)
+                    {
+                        if (itemPtr.getClass().getScript(itemPtr).empty())
+                        {
+                            MWBase::Environment::get().getWorld()->dropObjectOnGround(ptr, itemPtr, amount);
+                        }
+                        else
+                        {
+                            // Dropping one item per time to prevent making stacks of scripted items
+                            for (int i = 0; i < amount; i++)
+                                MWBase::Environment::get().getWorld()->dropObjectOnGround(ptr, itemPtr, 1);
                         }
                     }
+
+                    MWBase::Environment::get().getSoundManager()->playSound3D(ptr, itemPtr.getClass().getDownSoundId(itemPtr), 1.f, 1.f);
                 }
         };
 
@@ -598,8 +619,10 @@ namespace MWScript
                     std::string soul = runtime.getStringLiteral (runtime[0].mInteger);
                     runtime.pop();
 
-                    MWWorld::ContainerStore& store = ptr.getClass().getContainerStore (ptr);
+                    if (!ptr.getClass().hasInventoryStore(ptr))
+                        return;
 
+                    MWWorld::InventoryStore& store = ptr.getClass().getInventoryStore(ptr);
 
                     for (MWWorld::ContainerStoreIterator iter (store.begin()); iter!=store.end(); ++iter)
                     {