Niagara Oscilloscope hangs indefinitely in cooked build

UE - Audio - Dec 9, 2020

Cooked games will hang on startup when using the Oscilloscope data interface due to an indefinite wait in FNiagaraSubmixListener::UnregisterFromSubmix  When setting GCVarEnableAudioCommandLogging t ...

Converting a function with local variables to an event crashes editor

UE - Gameplay - Blueprint - Dec 9, 2020

When converting a function with a local variable to an event, editor crashes. Issue does not occur in 4.25, therefore a regression. ...

World Memory Leaks crash with a hidden sublevel to a redirector

Tools - Dec 8, 2020

From UDN: The reason it crashes is because Child doesn't get garbage collected, which is because it still has the RF_Standalone flag. UEditorEngine::EditorDestroyWorld clears RF_Standalone flag ...

FBX SkeletalMesh import - Some custom attribute values interfere with SkeletalMesh Import/Export

UE - Editor - Content Pipeline - Import and Export - Dec 8, 2020

It appears that the value of a string custom attribute on a SkeletalMesh node can interfere with the import process of the SkeletalMesh, as well as with the export process according to UDN. Adding t ...

Unable to play level sequences or actor sequences while the game is paused

UE - Anim - Sequencer - Dec 7, 2020

This is caused by several failures in the custom ticking and update logic for level and actor sequences. A possible solution is shelved in 14859265, but will need testing with all known cases of pau ...

Crashed when selecting a class for a property in BP

UE - Gameplay - Blueprint Editor - Dec 5, 2020

Collision boxes always have Navigation Area Class reset to NavArea_Obstacle on project load

UE - AI - Navigation - Dec 4, 2020

Every time when reopening the project, Nav Area Class on collision geometry gets reset to "NavArea_Obstacle", instead of maintaining its state. ...