Unreal Engine Issues

Crash when changing r.MaterialQualityLevel when FastGeo plugin enabled in cooked build

The engine crashes when the r.MaterialQualityLevel is changed in a cooked game that uses the FastGeo Streaming Plugin. The crash doesn't repro with the same steps in Editor, just in a cooked build. ...

Crash when using a bitmap in a material

see repro steps: direct crash the material comes from FAB model:  [Link Removed] ...

Engine Crashes When Building Lighting if Precomputed Visibility Aggressiveness is set to VIS Max

The engine crashes when building lighting if World Settings >> Precomputed Visibility >> Visibility Aggressiveness is set to "VIS Max." A Fatal Error message sometimes appears (screen shot attached) ...

An ensure is triggered when a StaticMesh is set inside a StaticMeshComponent on an actor, and another actor references the static mesh actor from two child actor components.

There is an issue when setting a Static Mesh inside a blueprint that it is referenced by another blueprint with more than one child actor. An ensure is triggered inside the engine, and there is a ...

Animation Modifiers that contain a null Animation Sequence value cause the Engine to crash when applied to an Animation Sequence

When an Animation Modifier passes a null Animation Sequence value to an Animation Sequence the Editor will crash. This is a regression from 4.20.3 (CL-4369336). This was reported and tested in 4.21 ...

When show propertymatrix and delete target actor, the editor crash

It looks like it is null reference in propertymatrix. It always occurs when I execute the reproduction procedure. ...

Crash when adding a streaming level to the world through Python

When using the Python plugin to add an existing level as a streaming level, the editor crashes. It seems that this happens regardless of what level is added or what the contents of that level are. A ...

check(!bPostTickComponentUpdate) fails triggered by ~FStaticMeshComponentBulkReregisterContext() and FD3D12DynamicRHI::ProcessInterruptQueueUntil()

Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears that it's not allowed to schedule mo ...

Material Editor Crash occurs on mathematical operation node receiving invalid input from a Texture Object

Copying a Folder in Sequencer and later Pasting it inside Sequencer is resulting in loss of Components

Copying a Folder in Sequencer and later Pasting it inside Sequencer is resulting in loss of Components. The pasted folder is not respecting the structure that was copied. This issue only happens on ...