Unreal Engine Issues
Unreal Engine Issues
If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible
UE - CAPT - Tools - Jul 31, 2025If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible. The behavior only shows after d ...
When Adding Custom Bindings, get ensure that "Multiple persistent shared references detected for Sequencer..."
zComponent - Archive - Nov 17, 2025Ensure: Error LogOutputDevice Ensure condition failed: SequencerRefCount == 1 [Link Removed] [Line: 967] 1. Error LogOutputDevice Multiple persistent shared references detected f ...
MultiProcessCook Shader Symbols fail to write when two workers race and try to write them at the same time
UE - Rendering - Architecture - Shaders - Jan 4, 2026When shadersymbols are requested, cooking shaders writes the symbol files into {Project} /Saved/ShaderSymbols/<PlatformName>. These symbols are written by the function FShaderSymbolExport::Write ...
World Override GameMode values do not save after project is closed and reopened
UE - Gameplay - Apr 17, 2015The gamemode settings under world override do not save once the project has been saved, closed and reopened. ...
Material Editor Viewport does not display World Position Offset
UE - Rendering - Graphics Features - Mar 19, 2026The preview Viewport in the Material Editor does not correctly render World Position Offset. It appears that the RenderVelocities pass (which is also drawing the depth for the preview sphere) does ...
The Ease function's Blend Exp reverts to its default value after closing/reopening the editor
UE - Gameplay - Blueprint - Jan 20, 2015The Ease function's Blend Exp reverts to its default value after closing/reopening the editor. Reproduced in 4.6.1 binary and in Main (CL-2408355). ...
Physics object set to OverlapAll will still collide with the player
UE - Gameplay - Aug 24, 2015Physics object set to OverlapAll will still collide with the player User Description: The pawn is simply colliding with and causing physics on objects it shouldn't be. To replicate: Set up a new ...
Foliage Instanced Static Meshes disappear when FISM Component BP is compiled
UE - World Creation - Worldbuilding Tools - Foliage - Nov 10, 2017This bug removes foliage from a level when the Component Blueprint is compiled. Switching the Foliage type asset to another component will cause the issue to stop occurring. The Component Blueprint ...
ServerTravel from a map with a GameMode set to Use Seamless Travel and then ServerTravel back from a map without Seamless Travel enabled will crash the editor
UE - Networking - Mar 3, 2015ServerTravel from a map with a GameMode set to Use Seamless Travel and then ServerTravel back from a map without Seamless Travel enabled will crash the editor. Reproduced in 4.7.1 binary and Main ( ...
A packaged game that contains a plugin with a custom struct and function using that struct will crash on launch.
UE - Foundation - Cpp Tools - Plugin System - Sep 9, 2015If a project is packaged with a plugin that contains a custom struct and a function that takes that struct as a parameter, the game will crash when the executable is run. [Link Removed] ...