Unreal Engine Issues

Common UI/Enhanced Input UI action binding issue

They've nailed it down to the following logic FUIActionBinding::TryCreate which doesn't check for the InputAction specified.// Make sure there is no existing binding for the same action associated w ...

Transient Subclasses of ABrush default to supporting external packaging

ABrush::SupportsExternalPackaging overrides the base implementation of  AActor::SupportsExternalPackaging which returns false for transient actors, but it doesn't call super. As a result, transient ...

Sequencer: muting transform's location/rotation/scale not working

UPlacementSubsystem can return unintended factories from FindAssetFactoryFromAssetData

Factories registered to the PlacementSubsystem using  UPlacementSubsystem::RegisterAssetFactory will always be added to the end of the AssetFactories array. Which means if there are any existing reg ...

Deprecating a non-const blueprint interface function replaces the implementation of the event with an empty custom event

This behaviour is only observed when implementing the function as a custom event from a blueprint interface. This behaviour is not observed in actors where the blueprint interface function is implem ...

Mass Agent Component implementation triggers Aggressive Default Reference Replacement ensure

Workaround: Construct the DefaultSubobject with ... = CreateDefaultSubobject<UMassAgentComponent>(TEXT("MASS"), true); The issue appears to be that the DefaultSubobject holds a pointer to the CDO ...

Contact shadow has box artifacts with backlighting for two sided Subsurface shading model

See slack channel: [Link Removed] ...

Luminance coefficients used throughout the engine not matching sRGB standard

This is causing confusion when working with color in UE5, specifically when validating for HDR between different reference materials. It has also been noted that the color primaries in PAL and NTSC ...

Enhanced Input Action Triggers may be silently ignored when using multiple bindings in a context

The root cause appears to be an order of operations change made for [Link Removed] (CL 18309493 in UE5/Main). On EnhancedPlayerInput.cpp:238, the TriggerStateTracker is combined with state evaluated ...

FColorSpaceTransform Crash on Linux due to misalignment

FLinearColor FColorSpaceTransform::Apply(const FLinearColor& Color) crashes while attempting to VectorLoadAligned() when running the UnrealEditor on Ubuntu 22.04. ...