Modifying FinstancedStruct (Blueprint structs) properties inside another FInstancedStruct triggers an ensure and properties do not get saved.

UE - AI - Dec 16, 2024

There is a bug with Blueprint structs having FInstancedStruct as a property. If you modify the DefaultValues of any property of an FInstancedStruct inside the blueprint struct asset, an ensure will ...

Using Depth of Field when "r.PostProcessing.PropagateAlpha" is enabled causes halo effect on higher scalability modes and resolution

UE - Graphics Features - Dec 16, 2024

There is a haloing effect when depth of field is used while post processing also has propagate alpha enabled at higher scalability levels. The effect becomes more obvious as the resolution of the vi ...

iPadOS AR App Crashes when ARKit's "Use Scene Depth for Occlusion" is Enabled

UE - Platform - XR - Dec 13, 2024

Does not crash in 5.4 on same hardware so looks like a regression. Attached Unreal logs indicate source of critical error: 'FARKitCameraOverlayMobilePS' shader uniform expression set mismatched sh ...

Foliage unbuilt instances have incorrect LOD

UE - World Creation - Worldbuilding Tools - Foliage - Dec 13, 2024

From licensee: Foliage instances are not drawn correctly/the wrong LOD is selected while painting in FoliageMode. This is more apparent when setting InstanceSettings>CullDistance>Max to a value != ...

Draw Debug String doesn't render text outside of play

UE - Editor - UI Systems - Dec 13, 2024

When calling the Draw Debug String node outside of play, no text is visible in the viewport. This occurs with Editor Callable functions on placed blueprints as well as from Editor Utility Widgets. ...

Can't get accurate Anim Notify State elapsed duration while in a montage.

UE - Anim - Gameplay - Dec 13, 2024

When GetCurrentAnimationNotifyStateTimeRatio is used inside of a montage it can return the wrong time ratio in certain cases. ...

Ejecting from player in multiplayer PIE results in the wrong world being displayed

UE - Networking - Dec 13, 2024

In [Link Removed], it mentions that only the instance in the editor viewport supports switching to Simulate In Editor when running multiple instances in PIE. However, rather than showing that instan ...

Keying Level Sequence Crashes Engine

UE - Anim - Sequencer - Dec 12, 2024

Repro rate 3/5 Regression to be tested Testing with a fresh level sequence no crash occurs, Tried to do it without rekeying and did not get a crash. I repro'd it a few times and sometimes no crash ...

COM Media Type error in video writer on 8K videos

TM - Rendering - Dec 12, 2024

360 videos set to 8K resolution will fail to render in Twinmotion 2024.1.2 and newer Render attempts will end abruptly shortly after being initiated with the following error message ion the logs L ...

Sequencer events with a payload of struct containing Object do not work

UE - Anim - Sequencer - Dec 12, 2024

A structure containing Object as a parameter is misrecognized as a single Object and loses the parameter. This behavior was brought in by CL-27785664. ...