Unreal Engine Issues
Unreal Engine Issues
Loading a map via File->Open Level... when it is already loaded in World Composition view does not reset actors to origin
UE - World Creation - Worldbuilding Tools - World Composition - May 14, 2019Loading a map via File->Open Level or just by clicking on it to open it, when it is already loaded in World Composition view does not reset actors to origin. The actors instead keep the same positio ...
Construction script does not properly reset array count
UE - Gameplay - Oct 28, 2019It appears that in UE 4.23, some specific arrays in construction scripts are no longer cleared automatically and retain references to TRASH objects from the previous construction script calls. This ...
Syncing changes in multi-user editing tool results in crash
UE - Virtual Production - Tools - Multi-user - Dec 18, 2019When using the multi-user editing tool inside a 4.24 project, persisting changes will sometimes result in a crash. Unable to reproduce the issue. However, the user has reported occasionally re ...
Reimporting of skeletal mesh results in a scrambled skeletal mesh
UE - Editor - Content Pipeline - Import and Export - Oct 17, 2025When we reimport our skeletal meshes with updated FBXs, the resulting skeletal mesh is scrambled up. See Scrambled.jpg attached. This does not affect every single reimport but happens randomly. W ...
FDetailGroup::AddGroup does not correctly apply the default expansion state for DetailGroups
UE - Editor - Workflow Systems - Feb 10, 2026There is a bug affecting DetailGroups in the engine. When adding child DetailGroups to a parent DetailGroup, the expansion state does not behave as expected and ignores the flags intended to control ...
[CrashReport] UE4Editor_UnrealEd!UnFbx::FFbxImporter::RecursiveBuildSkeleton()
UE - Editor - Content Pipeline - Import and Export - Jul 30, 2015This is a common crash affecting users. User DescriptionsJust import a Mesh of Fuse Source Context 624 void UnFbx::FFbxImporter::RecursiveBuildSkeleton(FbxNode* Link, TArray<FbxNode*>& Out ...
[CrashReport] UE4Editor_Sequencer!FSequencer::NotifyMovieSceneDataChanged()
UE - Anim - Sequencer - Jul 24, 2017This is a common crash affecting users in 4.16 and into the 4.17 Preview. User Descriptionscopying-pasting curves in Sequencer Source Context 979 void FSequencer::NotifyMovieSceneDataCha ...
"Support Compute Skincache" throws an Assert for games on Linux
UE - Graphics Features - Apr 16, 2019After enabling "Support Compute Skincache" in the project settings and packaging a game on Linux, the packaged game will throw an assert. Any setting that turns "Support Compute Skincache" on automa ...
Cloth Rendering - Optimizations cause a one frame geometry stretch when off screen cloth is teleported back on screen.
UE - Simulation - Core - Aug 26, 2021Render optimizations are causing the cloth render data to be updated one frame too late after an off screen cloth object has been teleported back on screen. The optimisation triggers itself after a ...
OnTextChanged not called for UEditableTextBox / UMultiLineEditableTextBox when text is set programmatically
UE - Editor - UI Systems - Sep 29, 2025When calling SetText() on a UEditableTextBox or UMultiLineEditableTextBox, the OnTextChanged delegate is not triggered. This regression was first reported in UE 5.3 and acknowledged previously in UD ...