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)); ...

"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 ...

nDisplay is not linking correctly the Camera Components inside the nDisplayConfig.uasset with display viewports when their Projection Policy is set to Camera. This issue appears when a packaged game is launched from the Switchboard as "Packaged Game".

When launching a packaged game from the nDisplay Switchboard, the nDisplayConfig file fails to link the cameras to the viewports. Inside the log generated by the Switchboard an error is displayed th ...

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.  ...

Cvars sections in Sequencer behaving incorrectly when using MRQ

Some key lines in the code:Engine\Source\Runtime\MovieSceneTracks\Private\TrackInstances\MovieSceneCVarTrackInstance.cpp:177 --> Apply   CVar when entering sectionEngine\Source\Runtime\MovieSceneTra ...

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. ...

Shadow artifacts on translucent objects when using the setting Cast Dynamic Shadows As Masked

Flickering shadow artifacts can be seen with translucent mateirals with "Cast Dynamic Shadows As Masked" enabled. Please note that the artifacts disappear when switching from virtual shadow maps to ...