Unreal Engine Issues

Gameplay Effects can hold stale references to GameplayTags when switching Gameplay Effect Component type

Gameplay Effects can hold stale references to Gameplay Tags when the adding component is switched for a different type. The tags are serialised, and their presence can be confirmed with Reference Vi ...

Crouching/Uncrouching while standing on a physics object will cause the object to behave erratically

Crouching/Uncrouching while standing on a physics object will cause the object to behave erratically. Even if the CharacterMovement component has Physics Interaction disabled, it will still effect t ...

Masked TwoSided material causing lumen direct lighting to leak through walls

It appears that LumenScene's Hardware Ray Tracing is causing light leaking into a sealed room (which should be perfectly black). This bug does not appear to happen on AMD GPUs. ...

Vray Material nodes are disconnected after saved if closing and re opening Unreal

Renaming a level by WorldPartitionRenameDuplicateBuilder fails if the level contains GroupActor with non-spatial actors

Referece to the source level should be fixed by FReplaceObjectRefsArchive, but it is not working because ArIsModifyingWeakAndStrongReferences is not set. It can be fixed by setting the flag.class FR ...

CPU Lightmass generates different lighting results on a landscape if executed via a commandlet vs through the editor

Building lighting via commandlet and via editor are giving different results. To prevent one method from polluting the other via Swarm cache, the cache needs to be cleared in between tests. ...

Invisible child components appear for one frame on scene capture 2D windows if another component is attached.

Invisible child components appear for one frame on scene capture 2D windows if another component is attached. ...

Force Next Floor Check doesn't work when the player is stopped

Force Next Floor Check doesn't work when the player is stopped, even though the tool tip says that it does. User Description: I'm trying to shrink / grow the collision capsule for our needs but wh ...

EnhancedInput Chorded Actions do not work on higher priority mappings

Reported from Prismatic: It appears that the Add Mapping Context function currently prioritizes low numbers over high numbers, which seems inconsistent with the function description and some parts ...

Calling SetupAttachment/AttachToComponent with 'this' as the parent inside a USceneComponent subtype's C++ ctor for nested component subobjects will result in all instances of the nested default subobject trying to attach to the CDO at registration time.

This occurs because the 'AttachParent' property is a UPROPERTY, and as a result when we create a new instance of a USceneComponent subtype, any USceneComponent subtypes it owns are treated as instan ...