Unreal Engine Issues

Editor crash while saving asset during cook operation

It is possible to experience an editor crash in 5.5.4 when the cook process generates a warning that references an asset while the editor is saving. It seems that during a save operation, the code t ...

Spawnable Level Instance via Sequencer in WP map

ULevelInstanceSubsystem::OnActorDeleted: check(!IsEditingLevelInstanceDirty(LevelInstance) && !HasDirtyChildrenLevelInstances(LevelInstance)); ...

Skylight Leaking Tint in Reflection

From 5.6 onwards, Skylight Leaking is much stronger in reflections than in the world. Also tested on //UE5/Release-5.6, CL 45232827 ...

"Build All Levels" does not re-AddNavigationSystemToWorld

The Build All Levels editor action cleans up the world's NavDataSet (UNavigationSystemV1::NavDataSet) as pre-rebuild world cleanup by calling: SetNavigationSystem(nullptr); inside UWorld::Cleanu ...

Crash when adding foliage instances to unloaded IFA

Ran into a crash when trying to programmatically add foliage to a large WP level with some unloaded IFAs.  ...

MRQ rendering crashes when there is an empty audio track

Fix up IOS errors calling UI API from non-UI threads

Motion Warping component disappears on Editor restart or when swapping engine versions.

Motion Warping component is disappearing on Editor restart or when swapping engine versions. When this occurs, the BP has the following Compiler Results messages: Component class is not set for'Mot ...

Submix Level's minimum changes from -96dB to -60dB after making any changes to value

Reproduces 3/3 times. Issue does not occur in //UE5/Release-5.1 - CL 23901901 Binary. Confirmed Regression. ...

GAS: FActiveGameplayCueContainer::RemoveCue crash while iterating removals when consecutive Cue tags are conditionally added and the conditional effects removed in ascending order

When removing gameplay effects by tag, if the tag that is being removed has other tags that are dependent on it in a cyclical way an "array out of bounds ' error can be triggered. ...