Unreal Engine Issues
Unreal Engine Issues
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 - Verse Class Editor - 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 ...
Fixing up GoogleVRHMD static analysis warning
UE - Platform - XR - Oct 31, 2016[Line 1585] d:\build++ue4+release-4.14+compile\sync\engine\plugins\runtime\googlevr\googlevrhmd\source\googlevrhmd\private\googlevrhmdrender.cpp(42) : warning C6386: Buffer overrun while ...
[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 ...
Cinema 4D melange to Unreal Datasmith: missing hierarchy and objects
UE - Editor - Content Pipeline - Datasmith - Importer - Sep 23, 2019Moving certain sub groups out of a group cause some of them to appear through a new datasmith import (in a new blank project), but most objects are still missing even with very small groups, and eve ...
Actors are not properly restored when undoing a Replace Selected Actors transaction
UE - Gameplay - Components - Jul 22, 2020When undoing a Replace Selected Actors operation, the resulting actor is corrupt and triggers an ensure where the root component is in the process of being destroyed. This is a regression that poppe ...
Cloth Rendering - Optimizations cause a one frame geometry stretch when off screen cloth is teleported back on screen.
UE - Runtime - Simulation - 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 - AI Workflows - 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 ...