Unreal Engine Issues
Unreal Engine Issues
Black viewport with artifacting when changing to MSAA with Forward Shading enabled
UE - Graphics Features - Dec 2, 2020DID NOT OCCUR IN BP FPS PROJECT - might be ContentExamples specific This issue does not occur when forward shading is disabled. Viewport error reads: TOO MANY OVERLAPPING SHADOWED MOVABLE LIGHTS ...
Mass entities initializing fragments on the incorrect archetypes due to shared CreationContext
UE - Engine Scaling - Mass - Feb 3, 2026UMassAgentSubsystem::HandlePendingInitialization creates a single FEntityCreationContext that is reused across all iterations of the PendingAgentEntities loop. When SpawnEntities eventually calls in ...
Custom Items and Inventory can appear enabled while actually being disabled
UE - Gameplay - Systems - Jun 10, 2026Toggling the Custom Items and Inventory setting and then closing the editor without saving can lead to a mismatch between the Project Settings Custom Items feature and the IslandSettings object in t ...
UAssetImportTask::bReplaceExisting is not supported with interchange
UE - Editor - Open File Formats - Import and Export - Aug 25, 2023Add this code to a function you call from a blue utility widget or any other way to start the import with this code.TArray<UAssetImportTask*> ImportTasks; for (int32 i = 0; i < cFC.Files.Num(); i++) ...
Crash when opening or editing a DataTable with a Row Structure that contains a BodyInstance
UE - Runtime - Deformable - Apr 5, 2024If a DataTable Asset is created with a Row Structure that contains a member variable of type BodyInstance, the Editor will crash when attempting to open it while it has no rows. It will also crash w ...
Regression with RecomputeTangents on SkeletalMeshes in 5.6
UE - Rendering - Features - Jul 21, 2025Licensee noticed a regression in 5.6 where the non-masked recompute tangents option doesn't work anymore. The option is called "Enabled with no mask" in 5.6 but "All" in 5.5. Under the hood, this se ...
Streaming Nodes and Runtime LiDAR point clouds causes Engine to Crash
UE - Editor - Open File Formats - Datasmith - May 16, 2022Frequent runtime operations on Lidar Point Cloud Octree cause Access Violation ExceptionEdit The Exception occurs while checking bInUse value of QueuedNode, which suggests that this QueuedNod ...
HiResShot in Standalone Play Not Saving Screenshots
Tools - Dec 8, 2014the High resolution screenshot is not saved when using the command 'HiResShot' when playing via the Standalone option. You can use the command and it shows the link to the directory where the screen ...
The Editor freezes during PIE when loading a .sav file from 4.7 in a 4.8 or 4.9 project
UE - Gameplay - Jun 24, 2015The Editor freezes during PIE when loading a .sav file from 4.7 in a 4.8 or 4.9 project. The user reporting this reports a memory leak and crash, but I have not been able to reproduce that in partic ...
Navigation does not work in sub-levels
UE - AI - Jan 28, 2015Navigation does not work in sub-levels. If the Nav Mesh Bounds Volume in a sub level is not touching a Nav Mesh Bounds Volume in the Persistent Level, it will not appear or function during Play. It ...