Unreal Engine Issues
Unreal Engine Issues
Opening a widget blueprint on Linux causes editor to crash
UE - Platform - Linux - Aug 25, 2016The editor crashes when attempting to open a widget blueprint. ...
UE4Editor does not start when there are no audio devices available
UE - Platform - Linux - Sep 26, 2018UE4Editor does not open when there are no audio input or output devices available. The editor hangs at 83% after it initializes the AudioMixer. This issue looks like it was caused by CL 4396954. Et ...
Linux crash when Exporting content
Tools - Jun 2, 2016When the ExportAll window is opened, changing the file type filter and attempting to edit the chosen file field causes the editor to crash. ...
Project breaks if Online Subsystem plugin is disabled
UE - Foundation - Core - Apr 25, 2017Disabling Online Subsystem prevents the project from loading. On Windows, this produces an error shown in attached screenshot. On Linux, this causes a crash with the attached callstack on project ...
Using ServerTravel from a map set as the Transition Map with Seamless Travel enabled in the Game Mode will crash the editor
UE - Gameplay - Mar 6, 2015Using ServerTravel from a map set as the Transition Map with Seamless Travel enabled in the Game Mode will crash the editor. Probably related to [Link Removed] Reproduced in 4.7.2 binary and Main ...
Editor crash on loading a project after enabling the Tango plugin on Linux
UE - Platform - Linux - Aug 22, 2017Enabling the Tango plugin on Linux causes the editor to crash on restart. Regression: No - Tango plugin not available in 4.16.3 (CL 3561208) ...
Adding "_API" specifier to FMovieSceneTrackEditor results in linker errors
UE - Anim - Sequencer - Feb 7, 2017Unable to add API specifier to FMovieSceneTrackEditor, results in compile errors (pasted in the callstack field) ...
During SIE (simulate) and ejected-PIE, modifying a map actor causes triggers RerunConstructionScript() which discards all runtime modifications to SCS components
zComponent - Archive - Sep 6, 2024When Simulating, or Playing-In-Editor and ejected, modifying an actor in the editor world causes the SIE/PIE runtime actor to recreate its blueprint added components via AActor::RerunConstructionScr ...
FCameraShakePreviewer retains world-outered UCameraShakeBase instances indefinitely, fataling CheckForWorldGCLeaks on editor map change
UE - ACT Character - Sequencer - Aug 21, 2026FCameraShakePreviewer is an FGCObject that strongly references the UCameraShakeBase instances it previews, and creates them outered to the previewed UWorld. Nothing releases them on world teardown, ...
ensure(PinHelpers::UnresolvedPins.Num() == 0); fails after undoing in the editor
UE - Framework - Blueprint Editor - Sep 6, 2025The underlying cause is some edge case involving a math expression node, which does some perhaps naive things with a contained graph. ...