Unreal Engine Issues

Closing a Geometry's Collection Dataflow Editor window when the ChaosVehiclePlugin is enabled is crashing the Unreal Editor when running it with the -stompmalloc flag

As the title describes, closing a Geometry's Collection Dataflow Editor window when the ChaosVehiclePlugin is enabled is crashing the Unreal Editor when it is running with the -stompmalloc flag. The ...

Race condition triggers an ensure 'bIsInitialized && Other.bIsInitialized' inside FVisualLogEntry::MoveTo on animation worker thread

A licensee reported occasionally triggers an ensure during automation testing, potentially when the GameThread flushes Visual Logger via FVisualLogger::Flush() and an animation worker thread executi ...

Crash compiling blueprint referenced by Level Sequence while sequence is open

Compiling a blueprint that is used in a sequence when the blueprint exists on a sublevel will cause a crash if the level sequence is currently open. ...

[CrashReport] UE4Editor_UnrealEd!FAssetEditorToolkit::GetDefaultTabIcon()

This is a fairly common crash that occurs in the 4.17 and 4.18 releases. This callstack was originally being tracked under [Link Removed], but that had specific repro steps that were confirmed fixed ...

Datasmith error when attempting to package - Error: Ensure condition failed: It->Value File:Engine\Plugins\Enterprise\DatasmithContent\Source\DatasmithContent\Private\DatasmithAssetUserData.cpp

Syncing a texture from source control while a material editor sampling it is open will crash the editor

Syncing to source control will cause a crash if a texture is synced that is being referenced by an open material editor, even if the texture hasn't been modified. A quick solution may be to close th ...

Widget causing ensure to trigger on end play

Widget is causing an ensure to be hit when exiting gameplay.  Tested in: 4.24 Preview2 CL#10091930 , 4.25 CL#10183780 Attached URL's from the user:  https://forums.unrealengine.com/community/ge ...

Creating a control rig via FControlRigBlueprintActions::CreateNewControlRigAsset crashes

FControlRigBlueprintActions::CreateNewControlRigAsset is crashing in ResolveObjectHandleNoRead.  Looking at the control rig in UControlRigBlueprint::Serialize, it's marked as pendingkill but I'm uns ...

Niagara Fluids Grid3D_Gas_Explosion causes a crash

Placing Grid3D_Gas_Explosion into a level then packaging the level for windows will crash the packaged project. The package will give an error that it crashed while loading and quit.  This does not ...

Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior

Changing the state of a PrimitiveComponent->BodyInstance while SetSimulatePhysics(false) updates the game thread but does not update the physics behavior. In the repro project provided (see addl in ...