Actor channel unable to go dormant if replication key is not changed

UE - Networking - Nov 4, 2021

If the subobject's RepKey is not updated after setting the actor to go dormant, then the subobject won't be replicated. This causes FObjectReplicator::ReadyForDormancy to return false for the subobj ...

Crash when reimporting SkeletalMesh with custom LOD

UE - Editor - Content Pipeline - Import and Export - Oct 29, 2021

In the case of "Reimport Base Mesh + LODs", there is no crash. ...

MoviePipeline: Can't inherit from UMoviePipelineSetting in BP due to PURE_VIRTUAL

UE - Anim - Sequencer - Oct 28, 2021

IsValidOnMaster/IsValidOnShot need to be BlueprintNativeEvents with a default C++ implementation and allow derived classes to override the function. This is needed so that you can create custom set ...

USkeletalMesh::SetSkeleton function is not a BlueprintSetter

UE - Editor - Content Pipeline - Asset Build - Oct 28, 2021

I have a fix ready for this in cl: 17967661 ...

FBXUVs can create null entries that will assert later

UE - Editor - Content Pipeline - Import and Export - Oct 28, 2021

Need to make sure we support nullptr entries or make sure we do not create such null entries. ...

Instances of Blueprints implemented native interface cannot be assigned to interface variables

UE - Gameplay - Blueprint - Oct 28, 2021

FInterfaceProperty::SerializeItem (and ImportText) attempt to determine if the passed in object implements the interface in question. They do this by calling GetInterfaceAddress, which tries to get ...

Sequencer frame range progression is not continuous

UE - Anim - Sequencer - Oct 28, 2021

The end of the level visibility section places a DeterminismFence. This causes the issue. The fence clips the frame range and produces a discontinuous frame ranges, e.g. 23201~24000, then 24001~24 ...

Set Texture Object on Niagara Components no longer works for render targets.

UE - Niagara - Oct 27, 2021

When adding support for cube texture ([Link Removed]) there was no check added for render targets, making them invalid for Set Texture Object, when they were previously supported. ...

OSS Steam: SteamSocket listen connections do not work after poll group changes

UE - Online - Oct 25, 2021

In 4.27 the logic in SteamSocket.cpp which is part of the SteamSockets plugin was changed to use Poll Groups instead of a removed API function that checked all children of a listen socket. However,  ...

Native default subobjects nulled in child Blueprints on compile

UE - Gameplay - Blueprint Compiler - Oct 25, 2021

From reporting UDN: "We had a weird issue with new components added in C++ not being instanced properly on non-direct Blueprint children. It seems to happen if loading of the parent BP is deferred ...