Unreal Engine Issues
Unreal Engine Issues
Assertion occurs when undoing a Child State's unparenting from another Child State in AI State Trees, leading to a crash.
UE - AI - StateTree - Apr 15, 2022Assertion occurs when undoing a Child State's unparenting from another Child State. Repro Rate: 5/5Assertion failed: false [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Slate\Public\Widgets\Views ...
SceneCapture2D Render Targets do not retain Alpha when in Rendering Preview for Vulkan and ES3.1
UE - Platform - Mobile - Dec 12, 2022Regression: This issue does not occur in Release-5.0, so this is a regression The widget completely obscures the screen only when switching Preview Rendering modes without looking at the create Blu ...
[CrashReport] UE4Editor_Slate!<lambda_c42855a8df853c2fca6077897314e16e>::operator() [slateapplication.cpp:1558]
UE - Editor - UI Systems - Slate - Nov 21, 2017This is a common crash that has occurred since at least 4.17. Based on the user comment below, this may be a VR issue (unconfirmed) User Descriptionsit seems to me UKismetMaterialLibrary::SetVector ...
Simple HUD in Topdown template will have rendering errors if played in Immersive mode
Tools - Feb 27, 2015Simple HUD in Topdown template will have rendering errors if played in Immersive mode (F11). It will cause a white flickering line on the left and top of the window that will start to blur as the p ...
Inconsistent ListView entry sizes can prevent the ListView from being scrolled to the bottom
UE - Editor - UI Systems - Slate - May 4, 2022Since the contents of a ListView are virtualized, the ListView estimates the size of the scroll box's contents based on the on-screen elements. This can lead to some situations where DistanceFromBot ...
The Open Level command is causing Android devices to freeze up
UE - Platform - Mobile - Dec 1, 2014If you use the Open level node in the newest promoted build, once the project is deployed to an Android device, when triggered with a UMG, the project will freeze and be unplayable. Issue does not ...
Niagara color picker user parameter preview no longer updates until confirmation
UE - Niagara - Apr 18, 2025Starting with UE 5.4, the Color Picker Tool no longer updates preview values in real time for certain editor windows like Niagara when working with User Parameters. This behavior is a regression fr ...
Infinite Script Recursion error crashes editor and produces UnrealScript errors in logs
UE - Gameplay - Blueprint - Aug 14, 2015Macro that causes an infinite script recursion error crashes editor and produces errors in output log referring to UnrealScript. Frequency: 3/3 Crash Reporter; [Link Removed] ...
In BP/Python Editor Utilities, function SetEditorProperty() unexpectedly fails for Actor Reference Properties on External Actors.
UE - World Creation - Worldbuilding Tools - May 19, 2024As part of the Python and Editor Scripting Tools, it is possible to programmatically set variables in actor instances of the current level just like when using the Details Panel in the Level Editor. ...
Lightmaps cannot be created correctly when copying Blueprint that has Static Light as Child Actor component on the level
UE - Graphics Features - Lumen - Jul 31, 2020In this project, BP with Spot Light registered as Child Actor is placed. If we copy and build, the following warning will be displayed. BP_Spotlight_GEN_VARIABLE_BP_Spotlight_C_CAT_330 'BP_Spotlig ...