Unreal Engine Issues

FComponentReference loses its actor reference when the target actor is reinstanced

The "OtherActor" pointer in an FComponentReference is invalidated when the referenced actor is reinstanced after compilation. ...

Use a shared context in Loading instead of copying the LinkerInstancingContext

Current LinkerInstancingContext are copying instead of being shared internally during loading which can induce a lot of memory usage when used with World Partition which can contains a lot of mappin ...

Check in UCharacterMovementComponent::SmoothClientPosition fails when travelling between servers

While attempting to connect and travel to a new server, the client's NetDriver will be shutdown, and a new pending net driver created (in UEngine::Browse). When the original NetDriver is destroyed, ...

Suspend/resume iOS Metal Crash on low end device with MTLCommandBufferErrorMemoryless error with lots of geometry

The project was built in Unreal 4.27.2 binary from the Epic Games Launcher. At this stage we have only observed the crash on devices with a hardware combination of Apple A9 1.8 GHz and 2GB of Memory ...

Reimporting static mesh doesn't respect changed lightmap settings

Licensee reports change of behaviour between UE4 and UE5 when reimporting a mesh after changing its lightmap build settings. Change of behaviour occurred in 17404767, which was to fix a similar pro ...

Memory leak in Array draghandles in PropertyEditorHelpers.cpp

Level sequence asset is dirtied when evaluating a spawnable attached to itself.

VSM cached shadows not updated-invalidated when masked material parameters are updated at runtime

Mesh reduction modules selection aren't properly applied on engine restart

Recent changes in the MeshReductionManagerModule::StartupModule() have introduced issues where it won't respect what reduction modules have been set in the config file. This is a big issue for plugi ...

Skeletal mesh bones cannot be selected in the viewport of the IK Retargeter

Skeletal mesh bones cannot be selected in the viewport of the IK Retargeter. They can still be selected via the bone name hierarchy. Reproduces in the following://UE5/Release-5.1 CL 2390901//UE5/Re ...