Unreal Engine Issues

Vehicles with at least one kinematic collision do not function anymore

Using at least one source of kinematic collision on a vehicle causes animations or movement to not function any longer. This issue persists on child bones and collisions as well. Users are unable to ...

Moving assets in the Editor fails to fixup references causing the project to generate errors

Moving assets in the Editor is very unreliable. References may or may not be fixed up. No direct error is presented or a warning about problems. Any moves of the gameinstance, string table or certai ...

If you add "All Nearby Spawned Actors" later, the first shot's animation will not be recorded.

If you replace steps 2 and 3 and add "All Nearby Spawned Actors" first, and then add the Source of "Level Sequence", the animation of the first shot will also be recorded. ...

Collision settings of an Instanced Static Mesh setup in the Construction Script are not preserved when the Actor is added to an Instanced Level

Tested in //UE4/Release-4.27 CL 18319896 using Level Streaming the camera was ignored by the ISM_Cube. Collision settings of an Instanced Static Mesh setup in the Construction Script are not preser ...

MoviePipeline: Apple ProRes/Avid DNx crash when "Overwrite Existing Output" is off

[AI] Assert leading to crash in FRecastTileGenerator::AddReferencedObjects

Licensee has reported a couple cases of an assert happening stemming from FRecastTileGenerator::AddReferencedObjects in a built game. They are limiting the MaxTileGeneratorTasks to 1. The crash occu ...

The Editor "Show Frame Rate and Memory" does not display the intended output on macOS.

Repro Rate: 5/5 This is a live issue that has been tested in the Binary build of //UE5/Release-5.1 at CL 23058290 and DOES NOT OCCUR in Windows and Linux but DOES OCCUR in Mac. This was tested on d ...

VirtualHeightfieldMesh shadow issues

A UDN reported ensure being encountered with VirtualHeightFieldMesh rendering on UE5. Those ensures remain an issue on 5.1 (UE5/Main) as of CL 19779838. [Link Removed] Attempting to repro on PC, th ...

Niagara user parameters out of sync between the Sequencer and the Details panel

User Parameters on Niagara actors do not sync in the details panel when animated with Sequencer. Scrubbing in sequencer does not update the details panel. ...

Guid reference warnings when using the Take Recorde

When we record a Take from a level actor, a warning about referencing the same Guid inside LazyObjectPtr.h appears. The functionality of the LevelSequence works as expeced, but when the initial tak ...