Iris - incorrect initial state in pawn's BeginPlay if replicated via huge object path

UE - Networking - Iris - Feb 11, 2025

This occurs when the pawn is initially replicated using the huge object path when first connecting to a server. Destroying and restarting the client's pawn works as expected. After connecting, the c ...

iPadOS AR App Crashes when ARKit's "Use Scene Depth for Occlusion" is Enabled

UE - Platform - XR - Dec 13, 2024

Does not crash in 5.4 on same hardware so looks like a regression. Attached Unreal logs indicate source of critical error: 'FARKitCameraOverlayMobilePS' shader uniform expression set mismatched sh ...

AMD PSO creation causes hang in SceneCapture2D with Nanite + ShowOnly primitives

UE - Graphics Features - Nanite - Jan 16, 2024

AMD RX 6800 XT driver appears to hang (or take a very long time) in the PSO creation of the FInstanceCullVSM_CS shader when using Nanite primitive filtering NOTES:Issue can be worked around by addi ...

Performance hitch from RemoveGeometryCache flushing the render thread

UE - Editor - Content Pipeline - Alembic - Jun 12, 2025

FGeometryCacheStreamingManager::RemoveGeometryCache calls FlushRenderingCommands which shows up as a hitch when profiling. [Link Removed] Ideally the flush added in CL#23782411 to fix a rare deadl ...

Staging a patch does not copy pak signatures when staging

UE - Foundation - Jun 10, 2025

When creating a patch with pak signing enabled the created output folder contains the pak files from the base release but does not contain the .sig files, even if they were enabled when creating the ...

Crash when enabling global logging in 5.4.2

UE - Foundation - Jul 3, 2024

Packaged projects on 5.4.2 (DebugGame) crash immediately on startup when it is opened through the command line using the global logging very-verbose argument. ...

"Current state is a conduit and will reset to ref pose" warning when using a conduit to select an entry state

UE - Anim - Gameplay - Dec 12, 2022

AnimBlueprintLog: Error: Current state is a conduit and will reset to ref pose. This can happen if a conduit is an entry state and there isn't at least one valid transition to take. State Machine(Te ...

Users can't change flags on asset entries in PSD when the asset was added via a Branch In notify

UE - Anim - Gameplay - Mar 19, 2025

Assets added to a PSD via a Branch In notify can't have their flags changed within the database. When the flags (like mirror, disable, etc) are changed, they revert back to the original value when ...

Stalled cook due to PoseSearchDatabase DDC storage/retreival

UE - Anim - Gameplay - Mar 27, 2025

reported via UDN: [Link Removed] ...

StreamableManager does not apply CoreRedirects to loaded paths

UE - Framework - Jun 12, 2025

When loading soft object paths directly, it applies any important CoreRedirects by calling the function FixupCoreRedirects if the initial load attempt fails. In the repro steps, this will apply this ...