Unreal Engine Issues
Unreal Engine Issues
[Debug Tools][Crash] - Enabling au.editor.ForceAudioNonStreaming causes editor to crash the next time the user PIEs
UE - Audio - May 31, 2022Encountered while going through some debug commands. Repro 3/3. Crash Reporter Link: [Link Removed]Assertion failed: ChunkIndex != 0 [File:E:\User\Engine\Source\Runtime\Engine\Private\AudioStreaming ...
Importing skeletal mesh with LODs and no animations generates additional skeleton and physics assets
Tools - Jan 13, 2017Does not occur in 4.14.3 binary or 4.16 perforce. Occurs in both P4 and Binary builds of 4.15. Only occurs with Import Mesh LODs enabled and Import Animations disabled. ...
Keying the Spawned Property of a Spawnable Breaks in the details panel
UE - Anim - Sequencer - May 18, 2017The spawnable mesh seems to be breaking when their spawned property is altered. If you uncheck the spawned property in Sequencer, the Details panel also breaks similar to keying the property. This ...
Class viewer does not save filters when closed
Tools - Jun 16, 2017Regardless how the filters are set in the Class Viewer window, closing and reopening the window causes the filters to be reset to the default options. Regression: No - this behavior exists in 4.15. ...
Setting Sky Distance Threshold to 0 in a Skylight does not disable the light
UE - Graphics Features - Jul 11, 2017When setting the Sky Distance Threshold to 0, the skylight in the level appears to make the level brighter instead of disabling the added light. This does occur in 4.16.2 and 4.15.3 ...
Animation Track in Shot Does Not Animate With Evaluate Sub Sequences In Isolation Enabled
UE - Anim - Sequencer - May 15, 2018When Evaluate Sub Sequences in Isolation is enabled in a shot, other shots inside the same sequences only play the transform track and do not play their animation track Does not affect 4.18.3 Relat ...
Bound Variables In UMG Are Deleted As Unused If Not Used In The Graph Window
UE - Editor - UI Systems - Mar 18, 2020If a variable is bound in the Design Window of a User Widget asset it will be deleted if you use the menu option "Delete all unused variables". Found in 4.24.3 CL#11590370 Reproduced in 4.23.1 CL#9 ...
Mutable compile hangs indefinitely when using Customizable Object Extension Data Constants
UE - Anim - Mutable - Oct 25, 2025I am getting a CO compile to hang indefinitely while compiling. It seems to be caused by the optimization in LocalLogicOptimiserAST that tries to convert 3+ conditionals into a switch statement. It ...
Meta Quest - Visual Artifacting in right eye with Lumen enabled and effects quality set to High
TM - VR - May 9, 2025Reported in SF [Link Removed] On Meta Quest headsets, when Lumen is enabled for VR, setting the Effects Quality to High can cause visual artifacts to appear in reflections in the right eye of the h ...
Assets containing TSet or TMaps fail to Nativize
UE - Gameplay - Blueprint Runtime - Dec 12, 2016Multiple compile failures while attempting to nativize the QABP_Containers asset in QAGame. Errors:[2016.12.12-15.20.04:831][486]UATHelper: Packaging (Windows (64-bit)): xgConsole: QABP_Containers_ ...