Unreal Engine Issues

A build may fail in Visual Studio if a space is added after the # in an include pre-processor instruction to allow a struct in one header file to reference a struct in the other

A project building in Visual Studio will sometimes fail with the error Unrecognized type 'FBar' - type must be a UCLASS, USTRUCT or UENUM. This can occur in situations where one struct was reference ...

Hot Reload crash on PIE with custom AIController and Perception Component

If a pawn in the level is using a custom AI Controller that sets the AIPerceptionComponent in code, the editor will crash on PIE after a hot reload. CrashReporter: [Link Removed] ...

StartCameraFade() breaks on mobile projects after editor is closed/reopened

If a project that is set to Mobile/Tablet and Scalable 3D or 2D uses StartCameraFade() to produce a fade in effect, the effect will not play in PIE if the editor is closed/reopened. ...

Crash when Undo after deleting a Material Layer of a Material Instance.

In Unreal Engine version 5.5.4, the Editor crashes when performing Undo after deleting a Material Layer of a Material Instance ...

Mesh painting on staticmesh doesn't always apply Colors to All LODs

See the video [Link Removed] ...

Exporting a spawnable through Python doesn't work

Possible bug with GAOGlobalDistanceFieldCacheMostlyStaticSeparately

The Global Distance Field can constantly update, even when the camera is stationary, in large World Partition maps. This bug requires a large amount of the World Partition map to be loaded to reprod ...

AutoLOD changes the static meshes LOD at different distances in VR Packages and Previews than in Editor

Packaged VR Projects and VR Previews change the LOD at a closer distance than in editor. ...

Toggling SetSimulatePhysics state on a Primitive component with a child PrimitiveComponent leaks PxShapes

FBodyInstance::Weld did not check to see whether or not child components were already welded to a parent. This meant that whenever Weld was called, ShapeToBodiesMap would continue to grow in size, e ...

Editor Crashes When Duplicating Actor that Contains Additional Components

Attempting to spawn a copy of an actor that has components that were added to an instance of that actor in the level causes a crash. Spawning the actor without adding additional components to the in ...