Unreal Engine Issues

'Malformed sequence hierarchy' ensure hit after modifying sub-sequence tracks

It's possible for there to be multiple instances of the same sequence in the evaluation states cache if the same sequence is used in multiple sub-sections. Caches are never removed from the evaluat ...

Modifying the view size can cause TSR history to allocate large amount of memory

When animating the split fraction of a splitscreen experience, TSR causes an significant increase in UAV memory. In PIX, this appears to be caused by TSR allocating the history multiple times when ...

PoseSearch Query is flipped 180 degrees 1 frame after a capsule/actor rotation happens.

Using MotionMatching with a PoseSearchSchema with a Trajectory grouping. The query gets rotated to match the capsule/mesh component instead of the offset root/actual location of those bones/trajecto ...

Hardware Lumen Surface Cache Artifacts on Nanite Geometry

When using Hardware Lumen with Nanite-enabled meshes in UE 5.6+, black / dark surface cache artifacts appear that result in generally darker and unstable lighting. These artifacts are not immediatel ...

Crash When Loading Cooked Material Assets in Editor Due to Shader Serialization

In Unreal Engine 5.6+, the new shader serialization logic in FShaderMapResourceCode::Serialize does not correctly handle cooked assets that are loaded back into the editor (e.g., from a mounted .pak ...

GAS: Double attributes not shown GameplayDebugger

Context The Gameplay Ability System lets devs specify numerical attribute properties in UAttributeSet subclasses. Although the preferred attribute property type is FGameplayAttributeData, GAS has l ...

GAS: GameplayAttribute picker incorrectly also lists AttributeSets' non-attribute properties

Context: FGameplayAttribute's details customization lets designers pick any attribute property from any UAttributeSet class. Problem: This currently displays all properties of UAttributeSet class ...

[PCG] Create PCG Asset from Level crashes on loaded sub-level exports

PCG Level Asset export doesn't support exporting a level while it is loaded as a sub-level. We should warn the user instead of crashing. ...

FMediaFoundationMovieStreamer::Init() returns true even if the movie could not open.

Bake to Control Rig blueprint function does not work on tracks in nested sequences in Editor

The Bake to Control Rig node only works with single-layered level sequences. Studios using a nested level sequence setup cannot use this function. [Link Removed] ...