Error when exporting OBJ unattended

UE - Editor - Content Pipeline - Import and Export - Dec 1, 2020

When doing an unattended OBJ export with python. The export will fail and give the atteched callstack. ...

Update Mesh Section incorrectly sets vertex colors for a Procedural Mesh

UE - Graphics Tools - Modeling Tools - Jun 21, 2022

This is a regression tested in //UE4/Release-4.27 CL#18319896 Update Mesh Section incorrectly sets vertex colors for a Procedural Mesh. The closer a colors R, G, or B value is to 1.0 or 0.0 the mor ...

Editor crashes upon PIE unless tick is disconnected and reconnected

UE - Gameplay - Blueprint - May 14, 2015

Project crashes if user presses compile or PIE unless they first disconnect and reconnect event tick within blueprint component BP_BuildStage. Frequency: 4/4 CrashReporter: [Link Removed] ...

Crash compiling Widget Blueprints that contain Dynamic Entry Boxes with their Entry Widget Class set to each other

UE - Editor - UI Systems - Jun 10, 2020

Currently the Dynamic Entry Box has no protection against recursion, leading to a stack overflow and a crash. This issue was reported and tested in 4.25 (CL-13144385). This was reproduced in 4.24.3 ...

Adding "_API" specifier to FMovieSceneTrackEditor results in linker errors

UE - Anim - Sequencer - Feb 7, 2017

Unable to add API specifier to FMovieSceneTrackEditor, results in compile errors (pasted in the callstack field) ...

Some post processing features in Preview Scene Settings do not update immediately

UE - Gameplay - Jul 28, 2016

In Persona or the Static Mesh Editor, some post processing features do not update immediately when the user changes them. This was seen with Color Grading and Lens Flare settings. It could affect ...

Setting Automatically checkout on Asset Modification in the editor does not check out files

Tools - Nov 20, 2015

When the checkbox for Automatically checkout on Asset Modification is set to true in the editor, updating files (blueprints, materials, etc) does not check them out automatically. REGRESSION Worki ...

Media player does not play audio or video on the Xbox One

Media Framework - Nov 18, 2016

Audio and video are not playing on Xbox One. This issue affects both MultiTrack and Single-Source media sources. Debug text output meant to display the audio / video track currently being played i ...

OnClick Events for buttons in 3D Widgets not firing in Multiplayer

UE - Editor - UI Systems - Mar 6, 2017

OnClick Events for buttons in 3D Widgets not firing in Multiplayer. This issue only affects the button component as other Widget components that used the Left mouse button function as expected Regr ...

'r.StaticMeshLODDistanceScale' doesn't effect 'show LODColoration'

UE - Graphics Features - Jun 21, 2017

'r.StaticMeshLODDistanceScale' doesn't effect 'show LODColoration'. It does effect the actual performance of the LOD in the level but the LOD Coloration doesn't reflect the change. Licensee Descrip ...