Update mLastTopic before executing scripts. In case the script contains ClearInfoActor it erase not the correct topic.

Other correction not linked with the bug:
- reset mActorKnownTopicsFlag at the same time as mActorKnownTopics
- don't call updateTopics in addResponse, it is already handled by the response
callback

CHANGELOG.md

@@ -41,6 +41,7 @@
     Bug #5502: Dead zone for analogue stick movement is too small
     Bug #5507: Sound volume is not clamped on ingame settings update
     Bug #5531: Actors flee using current rotation by axis x
+    Bug #5548: Certain exhausted topics can be highlighted again even though there's no new dialogue
     Feature #390: 3rd person look "over the shoulder"
     Feature #2386: Distant Statics in the form of Object Paging
     Feature #5297: Add a search function to the "Datafiles" tab of the OpenMW launcher

apps/openmw/mwdialogue/dialoguemanagerimp.cpp

@@ -121,6 +121,7 @@ namespace MWDialogue
         mTalkedTo = creatureStats.hasTalkedToPlayer();
 
         mActorKnownTopics.clear();
+        mActorKnownTopicsFlag.clear();
 
         //greeting
         const MWWorld::Store<ESM::Dialogue> &dialogs =
@@ -300,11 +301,11 @@ namespace MWDialogue
                 }
             }
 
+            mLastTopic = topic;
+
             executeScript (info->mResultScript, mActor);
 
             parseText (info->mResponse);
-
-            mLastTopic = topic;
         }
     }
 
@@ -323,6 +324,7 @@ namespace MWDialogue
         updateGlobals();
 
         mActorKnownTopics.clear();
+        mActorKnownTopicsFlag.clear();
 
         const auto& dialogs = MWBase::Environment::get().getWorld()->getStore().get<ESM::Dialogue>();
 

apps/openmw/mwgui/dialogue.cpp

@@ -678,7 +678,6 @@ namespace MWGui
     {
         mHistoryContents.push_back(new Response(text, title, needMargin));
         updateHistory();
-        updateTopics();
     }
 
     void DialogueWindow::addMessageBox(const std::string& text)