Unreal Engine Issues
Unreal Engine Issues
Memory Leak When Raytracing Enabled with Specific Rendering Settings
UE - Graphics Features - Ray Tracing - Apr 8, 2025When a shipping build is packaged using specific rendering settings a memory leak can be observed. The licensee has noted that this leak presents as a 10MB per hour increase in RAM usage. It has a ...
Exporting a spawnable through Python doesn't work
UE - Anim - Sequencer - Jan 29, 2020Set Editor Property node no longer works with Material Instances in UE5
UE - Framework - Blueprint - Feb 18, 2022This is a Regression. Using an Editor Utility Widget to set properties on materials via Set Editor Property doesn't work in UE5 as it did in UE4. ...
Possible bug with GAOGlobalDistanceFieldCacheMostlyStaticSeparately
UE - Rendering - Graphics Features - Jun 2, 2025The Global Distance Field can constantly update, even when the camera is stationary, in large World Partition maps. This bug requires a large amount of the World Partition map to be loaded to reprod ...
CppCompileWarningSettings.NonInlinedGenCppWarningLevel messages should contain Warning\Error
UE - Foundation - Cpp Tools - UnrealBuildTool - Oct 8, 2025The messages emitted when CppCompileWarningSettings.NonInlinedGenCppWarningLevel is set to Warning\Error should contain the literal so the tools pick them up and react accordingly. From the EPS c ...
Chaos Fields: LS_MasterField continuously creates components every frame and never cleans them up
UE - Simulation - Visual - Mar 25, 2026While active and ticking, the built-in FS_MasterField actor instance continuously creates several new components every frame, which are never cleaned up until the actor is destroyed. This can happen ...
[CrashReport] Ensure - UE4Editor_Renderer!FPlanarReflectionParameters::SetParameters() [planarreflectionrendering.cpp:704]
UE - Graphics Features - Apr 4, 2018No user comments in crash group. Similar callstack in [Link Removed] but that is a crash and this is an ensure. 701 if (ReflectionSceneProxy && ReflectionSceneProxy->RenderTarget) 702 ...
Editor will crash while instancing nested AIPerception component template subobjects in an AIController-based Blueprint class during compile-on-load.
UE - Gameplay - Blueprint - Mar 23, 2018User report of an assertion that fires on editor reload during an attempt to reload an AIController-based Blueprint class with a dependency on a child Blueprint class, both created in a previous edi ...
Editor crash when saving a level instance in a folder with the same name as the level
UE - World Creation - Worldbuilding Tools - OFPA - Jan 27, 2023Alpha channel is not working on drag and drop function
Tools - Nov 5, 2014When using the drag and drop function in UMG on an image with an alpha map the background will show up as black instead of translucent. ...