Unreal Engine Issues

[CrashReport] Assertion failed: !IsLoading() in CollectGarbageInternal()

This is a common crash occurring for users in the 4.16 release. It is spread out across many different CrashGroups with slight variations in callstack. Users have not provided any descriptions whe ...

Editor crash when saving a level instance in a folder with the same name as the level

Apex Cloth disappears when Setting Custom Time Dilation to Zero

Apex Cloth assets disappear if you set the Custom Time Dilation to 0.0. You can workaround the issue by setting the Custom Time Dilation to 1.0, and then use the 'Force Cloth Next Update Teleport a ...

[CrashReport] Mac crash - FShaderCompilingManager::ProcessCompiledShaderMaps()

This is an infrequent Mac crash in the 4.18 release. The callstack is a match to [Link Removed] (loading Zen editor on Mac), but that was confirmed fixed for 4.18.0 while this continues for users. ...

Shader compiler errors when using enclosed local variables in a material while ray tracing is enabled

A licensee is seeing an issue with a couple of post process materials after enabling ray tracing. While the materials presenting the issue fail to compile for different reasons, they both refernce t ...

Shortcut(Function, Add a new function graph) leads to crash in the MacroLibrary editor.

Shortcut will still led to create a new function in the macro library. and this makes engine crash with following callstack. Assertion failed: Blueprint->BlueprintType != BPTYPE_MacroLibrary [Link ...

Navmesh blocking representation for cylinders is wrongly offset when the mesh has IsDynamicObstacle=true

In a mesh asset, setting Navigation>IsDynamicObstacle=true will make the Navigation / Cylinder Collision projection appear in a wrong position. As described in the case, the fix should reside in Na ...

Widget components and widgets in screen space are not the same color

Widget components appear to be affected by lighting. This causes differences in color between widget components and widgets that have been added to the viewport. ...

If enable Preview Slot of non-default slot in AnimMontage, AnimNotify of AnimationSequence does not run.

The AnimSingleNodeInstance used in the AnimMontage preview does not consider multiple Slots. The following is a correction code. void UAnimSingleNodeInstance::SetAnimationAsset(class UAnimationAsse ...

Using the end of the curve as a weighted tangent does not yield the expected value.

When changing the tangent value, the last value is sometimes not 1.0 [Reproduce sample project] [Link Removed] ...