Invalid object while verifying cluster assumptions during ShooterGame replay with matinee actor

UE - Anim - Sequencer - Apr 21, 2021

This seems to be caused by the matinee actor on Highrise and only appears to be reproducible in a packaged build of ShooterGame, not from the editor. See attached UDN for more information. ...

Memory Leak With NullRHI

UE - Rendering - RHI - Apr 21, 2021

Adding a new component to a parent class breaks child Blueprints

UE - Gameplay - Blueprint - Apr 16, 2021

See UDN(308147): [Link Removed] ...

RemoveWindSource modifies game thread array while in a parallel for loop.

UE - Simulation - Physics - Apr 16, 2021

FScene::RemoveWindSource is called from a parallel for loop, and concurrently deletes wind component pointers from the same game thread array causing crashes when the scene contains multiple wind so ...

Retainer box widget causes progress bars to render incorrectly

UE - Editor - UI Systems - Slate - Apr 14, 2021

Retainer boxes are currently causing progress bars to render incorrectly. This looks to be related to [Link Removed] which is fallout from the changes to retainer widget transform calculation introd ...

Landscape Distance Fields artifacts when using DX12

UE - Rendering - Apr 13, 2021

This problem was reported in this UDN:https://udn.unrealengine.com/s/question/0D52L00005PbEYNSA3/landscape-distance-fields-artifacts?fromCase=1 ...

Collections in content browser can't display native classes on 4.26

UE - Editor - Content Pipeline - Content Browser - Apr 12, 2021

The filter in UContentBrowserClassDataSource::CompileFilter does not work because the enumerated class objects are FName without path, while the filter item is name with path. [Image Removed] ...

Strange performance when adjusting r.ScreenPercentage

UE - Rendering - Apr 6, 2021

A UDN user has reported strange performance characteristics with occlusion queries / lights when using screen percentage. It appears using a higher screen percentage is faster; the user attached a s ...

SweepComponent fails against non-root bodies of skeletal mesh component in PhysX

UE - Simulation - Physics - Apr 6, 2021

UDN - https://udn.unrealengine.com/s/question/0D52L00005H9X5XSAV/sweepcomponent-never-returns-a-valid-hit-against-skeletal-meshes-when-using-physx?fromCase=1 ...

Deprecated Event Dispatchers on components do not warn on their attached actors

UE - Gameplay - Blueprint Editor - Apr 5, 2021

[Link Removed] ...