Unreal Engine Issues
Unreal Engine Issues
UMG Widget Hierarchy auto-expands on simple changes causing frustration and a slow work flow
UE - Editor - UI Systems - Oct 10, 20161. Create a hierarchy in UMG that has a couple layers deep of children such as vertical boxes that have multiple children that are vertical boxes, widget switchers .. 2. Collapse all children in th ...
[CrashReport] Crash on Linux - llvm::MachineFunctionPass::runOnFunction()
UE - Platform - Linux - Jun 16, 2017This is a top community crash occurring on Linux. A log file is attached. Additional information is currently unavailable. ...
[CrashReport] UE4Editor_Engine!FPhysScene::SyncComponentsToBodies_AssumesLocked() [physscene.cpp:1271]
UE - Simulation - Physics - Dec 1, 2017This is a common crash in 4.18 and 4.18.1. The callstack shares similarities to [Link Removed], although that has been confirmed fixed in 4.18. Included in the same crashGroup are also a few Ensur ...
FBlackboardKeySelector filters aren't applied when recompiling blueprint if a behavior tree asset containing the blueprint added as a service is closed, or if the blueprint is reparented.
UE - AI - BehaviorTree - Sep 24, 2025Context In Behavior Trees, BT Services can be added to nodes. Those services can have configurable FBlackboardKeySelectors. BlackboardKeys are variables on a blackboard that the behavior tree can r ...
A welded hierarchy blocks updates to collision settings on all but the root primitive. Calling SetCollisionResponseToChannel on the children won't work.
UE - Simulation - Physics - Nov 22, 2024A welded hierarchy blocks updates to collision settings on all but the root primitive. Calling SetCollisionResponseToChannel on the children won't work. The licensee noticed that IPhysicsProxyBase* ...
If using Launcher build, Advertising Identified (IDFA) code for iOS can NOT be disabled by project settings
UE - Platform - Mobile - Jun 18, 2019By [Link Removed], user can disable IDFA without customizing engine code. But, if using Launcher build, the added settings( Enable Advertising Identified(IFFA) ) does NOT work correctly. Because eng ...
Inaccurate Panning on Tap Delay Submix
UE - Audio - Oct 5, 2021The panning in the Tap Delay Submix Effect does not always match its assigned Pan in Degrees value. Specifically, the left and right side appear to be reversed on Stereo setups. In addition, in 5.1 ...
Deprecated blueprint variable fixups may fail depending on loading order
UE - Framework - Blueprint - Mar 7, 2024There is currently no simple way to do a deprecated variable fixup on native variables that are set by a blueprint class. For a simple variable rename, CoreRedirects can be used and will work proper ...
The Label field does not function for Editor Utility Tool Menu Entry
UE - Editor - UI Systems - Nov 22, 2022Labels for buttons added to the Level Editor Toolbar from the Editor Utility Tool Menu Entry blueprint do not appear in the toolbar. This functionality did exist in 4.26/4.27 but no longer seems to ...
[CrashReport] UE4Editor_ClothingSystemEditor!UClothingAssetFactory::CreateFromSkeletalMesh() [clothingassetfactory.cpp:357]
UE - Simulation - Physics - Character - Aug 21, 2017This is a trending crash occurring in 4.17 and 4.17.1. Users have not provided any descriptions of their actions when the crash occurred. Source Context 345 if(Params.bTryAutoFix && Param ...