Unreal Engine Issues

Iris - always relevant actors placed in the map do not appear in the debug list

This seems to occur regardless of which filter is used and whether bNetLoadOnClient is true or not. ...

Exporting process stuck in "Estimated time" phase when uploading projects with Panorama Sets & Presentation after freshly booting TM

Cloud Build: TWINMOTION CL app-2023.2.33001994-2024.1.37216540-2025.1.38508591-cloud-2024.12.02.095314 (DEV / STAG, CHROME) Issue: Exporting process stuck in "Estimated time" phase when uploading p ...

Duplicated TextureLoadVirtualPageTable in GetCustomData functions in generated HLSL add to the total instruction count due to TextureLoad having side effects

When using materials with CustomData inputs, such as the Eye material with Iris Distance and Mask, Virtual Texture samples will increase the instruction count for each unique VTPageResult. Each cus ...

Enabling "ShowFlag.PhysicalMaterialMasks" causes editor crash when physical material masks aren't yet imported.

When there is a physical material mask asset that has been created and applied to a mesh in the level without having a texture source imported yet, and then "ShowFlag.PhysicalMaterialMasks" is enabl ...

Playing a Haptic Soundwave will crash the editor

FRenderThreadCommandPipe::EnqueueAndLaunch does not properly capture/reapply LLM Context in all situations

When multiple render commands are enqueued before the graph task runs for a prior enqueued command, the new commands will be put into the Queue for the task to run and no context is captured. When t ...

Apple Vision Pro Mixed immersion mode can't be enabled in Binary versions of UE

Crash when enabling r.PSOPrecache.Resources due to check() in FSkeletalMeshObjectGPUSkin::GetUsedVertexFactoryData

The game crashes because of a nullptr SkinnedMeshComponent in  FSkeletalMeshObjectGPUSkin::GetUsedVertexFactoryData when r.PSOPrecache.Resources is enabled and a skeletal mesh is loaded due to a new ...

Large World Coordinates appears to not work for Niagara Mesh Particles

When a Niagara System is placed at around 10^8 units away from the origin, the movements of the mesh particles aren't smooth as expected, but jumpy. These particles behave as if they are using a flo ...

Game thread anim task evaluation can happen on first frame update even when bTickAnimationOnSkeletalMeshInit is unset

The bTickAnimationOnSkeletalMeshInit should prevent a game thread update of the anim instance on the frame that a mesh is spawned.  However, a bug in RefreshBoneTransforms is resulting in a game thr ...