When changing the Visibility of a RetainerBox wrapped widget to “Not Hit-Testable(Self&AllChildren)”, the widget incorrectly accepts the hit test

UE - Editor - UI Systems - UMG - Jan 28, 2025

The result of changing the Visibility of a widget placed as a child of RetainerBox is not reflected. Here we have disabled hittest for the Button widget, but hittest is incorrectly accepted. This is ...

[AI] UE_MT_SCOPED_READ_ACCESS(NavElementAccessDetector) Fails in editor on fresh sync

UE - AI - Navigation - Jan 27, 2025

Licensees have reported failed multi-thread access code for NavElementAccessDetector in complex levels that have not finished compilation of their static meshes. The eventual failed check is inside ...

ensure(false) being fired in FGenericParticlePairMidPhase::FindOrCreateConstraint from key collision

UE - Simulation - Physics - Jan 27, 2025

ensure(false) being fired in FGenericParticlePairMidPhase::FindOrCreateConstraint from key collision. The licensee reports one of their users reported this issue and they were able to reproduce a fe ...

Dumping of world partitioned HLOD stats fails in commandlet

UE - World Creation - Worldbuilding Tools - HLOD - Jan 27, 2025

Dumping of world partitioned HLOD stats in commandlets no longer works since updating to Unreal 5.5. The cause seems to be that the functionality has been moved from UWorldPartitionHLODRuntimeSubsys ...

Closing a Geometry's Collection Dataflow Editor window when the ChaosVehiclePlugin is enabled is crashing the Unreal Editor when running it with the -stompmalloc flag

UE - Simulation - Physics - Jan 27, 2025

As the title describes, closing a Geometry's Collection Dataflow Editor window when the ChaosVehiclePlugin is enabled is crashing the Unreal Editor when it is running with the -stompmalloc flag. The ...

Lyra 5.5 - LAS_ShooterGame_SharedInput has got a missing reference on InputMapping #1

UE - Gameplay - Input - Jan 27, 2025

The templated Lyra project for 5.5 is missing a reference to IMC_Default_KBM on /ShooterCore/Experiences/LAS_ShooterGame_SharedInput because it looks like IMC_Default_KBM was renamed to IMC_Default. ...

[Interchange][gltf] Imported animation are all 1 frame long.

UE - Editor - Content Pipeline - Import and Export - Jan 27, 2025

All the imported animation only contain one frame. If the file contains in archive are imported in a gltf web viewer we can see animation are playing.  [Link Removed] [Link Removed] https://foru ...

Improve time slicing of UWorld::RemoveFromWorld (RouteEndPlay pass and post-RouteEndPlay pass)

When a Level is being removed from world (UWorld::RemoveFromWorld), the time slicing (time limit) is not respected especially if the EndPlay of actors takes some time.Before starting the RouteEndPla ...

Crash when toggling the SmartLinkEnabled state of a NavLinkProxy specifically in a packaged game targeting Debug/Development

UE - AI - Navigation - Jan 24, 2025

The licensee has reported, and I was able to reproduce, that specifically in package builds targeting Development configuration, trying to toggle the SmartLinkEnabled state of a NavLinkProxy will cr ...

Shader info strings overlap in MaterialInstanceEditor and are unreadable

UE - Rendering Architecture - Materials - Jan 24, 2025

CL-35369646 changed the debug information string to span multiple lines, but the Y offset moves forward by only one line, so the string overlaps. ...