Unreal Engine Issues

[Impulse Response] - Opening an Impulse Response asset throws errors in the Output Log

Errors are appearing in the log when opening an Impulse Response asset type. This does not occur in Release-5.0 and is a regression. Note: The IR appears to still work normally as part of a Submix E ...

Actors disappearing after saving a large number of modifications to world partition maps

From Licensee: "We've encountered a world partition bug where newly created actors go missing in the viewport and Outliner after saving modifications to a large number of actors. This bug is partic ...

Blueprint Interface Implemented and Inherited Interface naming is reversed

Naming for Inherited Interfaces and Implemented Interfaces is reversed in 5.1 and Main. Inherited interfaces act like implemented interfaces, and inherited interfaces appear listed under Implemented ...

Artefacts with Volumetric Clouds

(Enduring Games) Please see UDN - Case includes project and potential fix from customer. Need to verify that it does not affect other parts of the volumetric composition. bHasValidSamples is the sam ...

Auto-creation of SmartObjectCollection is often undesired

Right now whenever a new world is created in the editor we automatically spawn a SmartObjectCollection actor for it, regardless of whether there are SmartObjects on the map. The SmartObjectCollectio ...

Fbx scene importer: memory corruption

Mirror Data Table is NOT added SyncMarker automatically when creating

Mirror Data Table is added rows about Bone, Curve, Notify when creating. But SyncMarker is ignored. The following codes can fix this issue. Engine/Source/Runtime/Engine/Private/Animation/MirrorDa ...

Clear FileItem cache when deleting files to prevent stale cached data

Should be straightforward, the UDN that reported this deletes all files using the FileItem interface so they can clear out the entry from the cache dictionary but there may be a way to just invalida ...

ProcessPriority performance consideration with Generation 12 Intel CPUs

It has been noted that the default BelowNormal process priority set in UnrealBuildTool is not handled well with the Gen 12 Intel CPUs as processes are only scheduled on the E-Cores which causes degr ...

Crash occurs when selecting Reset this Property to Default Value in the Class Settings of a new Child Animation Blueprint

This is a Regression. Tested in //UE5/Release-5.0 CL20979098 - "None" is not an option for the parent class and the "Reset this Property" is not initially there. Crash occurs when selecting Reset t ...