Reimporting of skeletal mesh results in a scrambled skeletal mesh

UE - Editor - Content Pipeline - Import and Export - Oct 17, 2025

When 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 ...

When CommonTabListWidgetBase and ScrollBox are arranged vertically, tabs within CommonTabListWidgetBase momentarily become selected when scrolling the ScrollBox upward

UE - Editor - UI Systems - UMG - Mar 19, 2026

When attempting to scroll the ScrollBox upward, the cursor briefly shifts focus to another widget (CommonTabListWidgetBase). When logging this behavior using LogSlate VeryVerbose, it can be observed ...

[CrashReport] UE4Editor_Core!FGenericPlatformMemory::OnOutOfMemory() [genericplatformmemory.cpp:161]

UE - Graphics Features - Apr 20, 2017

Based on CrashVisualizer data, crashes of this nature are the 4th most common in the 4.15.1 release. This crash may be expected due to the clear messaging that the system is out-of-memory, but this ...

Changing the object being debugged while stopped at a breakpoint has no long term effect if there was no object selected at the start of the breakpoint

UE - Gameplay - Blueprint Editor - Sep 30, 2019

The issue is that when we hit a breakpoint with no 'object to debug' set, we will set a flag bResetObjectBeingDebuggedWhenFinished to true, so after you resume execution we'll clear that flag and fo ...

FsplineComponentVisualizer inconsistent selection/deselection behavior in the Level Editor

UE - Editor - Workflow Systems - Aug 2, 2023

It seems to be more intuitive if the component is selected on the Details Panel when activating a ComponentVisualizer in the Level Editor viewport. This is what happens in the Blueprint Editor’s Com ...

Setup command not downloading GitDependencies on arm64 Mac

UE - Platform - Apple - Jul 26, 2023

When running setup command on an M1 arm64 mac the dependencies fail to download. This issue is occurring in Github //UE5/Release-5.3 @ CL 26560699 This issue is NOT occurring in Github //UE5/Rele ...

Motion Matching: Check failure when adding sequence into DB that references a niagara emitter

UE - Anim - Gameplay - Aug 7, 2024

The serialization code for the motion matching database has a check that will fail if a property has the IgnoreForMemberInitializationTestName meta tag.  Niagara emitters contain a property that has ...

Remote members not correctly removed from lobby

UE - Online - Nov 17, 2025

While the OnLobbyMemberLeft event does seem to be fired correctly, the remote member will still be in the lobby's "Members" map, and its data can still be found in FLobbyClientData::MemberDataStorag ...

Search field in 'Quickly Add to Project' fails with Chinese Pinyin input unless manually focused

UE - Editor - UI Systems - Localization - May 28, 2025

A licensee reported that under the Chinese language setting in UE5, using the “Quickly Add to Project” button results in incorrect or ignored input when entering text via Pinyin IME. If the user sta ...