Crash when renaming a component to same name as a deleted inherited component.

UE - Gameplay - Blueprint - Oct 24, 2019

Fatal error "UE_LOG(LogObj, Fatal,TEXT("Renaming an object (%s) on top of an existing object (%s) is not allowed"), *GetFullName(), *ExistingObject->GetFullName());" is hit in UObject::Rename.  ...

Crash undoing in Montage editor with no montage sections

OLD - Anim - May 22, 2017

Crash occur in the animation montage editor when the user does an undo action with no montage sections. ...

Cannot Set Visibility for a 3D widget component that is applied to Screen space

UE - Editor - UI Systems - May 5, 2015

User Can hide a 3D widget component that is in world space. However, if they use a widget component that has been switched to Screen space this is no longer possible. List of ways that do not work ...

Cloth environment collisions with APEX clothing is not thread safe.

UE - Simulation - Physics - Character - Jan 17, 2017

This looks like a thread safety bug that's been in the clothing system for a very long time. Essentially a skeletal mesh component does a transform update and attempts to update the collisions of a ...

Instanced Static Mesh components update incorrectly in Standalone and Packaged game

UE - Gameplay - Aug 11, 2017

Instanced Static Mesh components update incorrectly in Standalone and Packaged game. When hit, all of the instanced static mesh components will snap to a singular location instead of each individual ...

UAssetImportTask::bReplaceExisting is not supported with interchange

UE - Editor - Content Pipeline - Import and Export - Aug 25, 2023

Add this code to a function you call from a blue utility widget or any other way to start the import with this code.TArray<UAssetImportTask*> ImportTasks; for (int32 i = 0; i < cFC.Files.Num(); i++) ...

Editor crashes when opening a project that includes a plugin with more than two custom Volume classes

Tools - Jun 7, 2017

Adding more than two custom Volume classes to a plugin results in any project that includes that plugin crashing when opening it in the Editor. There does not appear to be a problem with adding thre ...

Adding a Local Variable to a blueprint Construction Script will cause a crash

UE - Gameplay - Blueprint - Dec 18, 2014

Adding a Local Variable to a blueprint Construction Script will cause a crash ...

Editor crashes if a data table containing an attenuation settings struct

Tools - Apr 19, 2016

Editor crashes if a data table containing an attenuation struct is opened in the data table editor. Frequency: 4/4 Crashreporter: [Link Removed] Regression? (No), issue (does) occur on 4.10.4 ...

Duplicating Level With Large _BuiltData File Results in Editor Crash

UE - Foundation - Core - Jun 7, 2018

Trying to duplicate a level in the editor that has a large _BuiltData file results in a crash. In the case of the supplied test level, it is over 3 GB. Crash repros in 4.19.2 and Main (CL 4115885). ...