Unreal Engine Issues
Unreal Engine Issues
Optimize Data Layer runtime state replication
UE - World Creation - Worldbuilding Tools - Data Layers - Dec 7, 2023[Link Removed]This issue occurs only when I have a lot of RDLs (I tested 2500 and 1600). I tested with 6 RDLs and had no issuesI also noticed in the server log an error when a lot of RDLs are presen ...
[AI] Failed check in UMassSpawnerSubsystem::DestroyEntities due to EntityManager still procesing
UE - AI - Mass - Sep 7, 2025It crashed when unspawning an AI which will destroy its entity. Inside DestroyEntities "IsProcessing" is true, but when it breaks into the debugger, "ProcessingScopeCount" is 0 (so IsProcessing shou ...
Point light missing issue on PowerVR GE8xxx when GPUScene is enabled
UE - Platform - Mobile - Sep 17, 2025On PowerVR GE8xxx devices (e.g., GE8320), running with GPUScene enabled on the OpenGL ES path, point/local Lights render nothing or significantly weak result. Withouy GPUScene(UniformView/UBO path), ...
The pak file specified in PakFileRules is not created correctly
UE - CoreTech - Aug 8, 2023The rules by which chunks are created are ambiguous and currently do not ensure that both PakFileRules and PrimaryAssetLabel settings are reflected. In this sample, depending on the PrimaryAssetLabe ...
Actors unrelated to the changelist being validated cause errors
UE - World Creation - Worldbuilding Tools - World Partition - Nov 22, 2023When validating a changelist, unrelated errors to the changelist can appear. Here's an example of running the validation on a cl named "temp cl" which just contains a single actor "Cylinder". The A ...
When Constrain Aspect Ratio is enabled, the display position of DrawDebug rendering becomes misaligned
UE - Editor - Developer Usability - Jan 21, 2026Display DrawDebugSphere at the DefaultPawn's positionSet bConstrainAspectRatio=true on the DefaultPawn's CameraComponent Setting bConstrainAspectRatio=true in CameraComponent causes DrawDebug renderi ...
Deadlock in UPhysicalAnimationComponent::UpdatePhysicsEngineImp
UE - Simulation - Core - Sep 13, 2023Deadlock in Chaos during PIE; the main thread is in USkeletalMeshComponent::HandleExistingParallelEvaluationTask waiting for a task to complete, and a worker thread is running that task and is in US ...
[Feature Request] CVars for HISMC
UE - World Creation - Worldbuilding Tools - Foliage - Jun 18, 2021Currently some (if not all or most) foliage CVars affect both foliage and HISMC. It would be nice to split this so that users can change the values of one without affecting the other. ...
Force Feedback has incorrect duration on iOS devices
UE - Platform - Apple - Sep 16, 2024The user also describes not being able to tell the difference between a force feedback value of 0.3 and 1,0 on iPhones Note: This is likely an issue somewhere in FIOSInputInterface::SetForceFeedb ...
Decals Normal only + Material Attributes
UE - Graphics Features - Mar 24, 2023This does not just work with BaseColor, you can affect any of the outputs by connecting something to a disconnected CreateMaterialAttributes. ...