Editing parent emitters with mesh renderer in a niagara system causes crash

UE - Niagara - Nov 9, 2021

After editing the parent emitters of a Niagara system with mesh renderer particles the engine will crash the next time the editor and system are opened.  This was tested with both engine content cub ...

Crash occurs when trying to edit a MetaSound Source asset while a MetaSound Source object is referenced utilizing FObjectFinder in C++

UE - Audio - MetaSounds - Apr 14, 2022

Crash occurs when trying to edit a MetaSound Source asset while a MetaSound Source is referenced utilizing FObjectFinder in C++ Repro Rate: 3/3Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\R ...

Editor crash on level load with multiple actors with the name "(none)"

Tools - Jun 14, 2017

If three or more actors are saved to a level with the same name in the Content Browser of "none", attempting to load the level (open or right click on umap asset in content browser) causes the edito ...

Crash occurs when opening a Blueprint that contains a variable that is of a type of a child of the Blueprint, as well as a component containing instanced UObjects

UE - Gameplay - Blueprint - Dec 23, 2016

A crash that is possibly the result of a circular dependency can occur if a Blueprint containing an ActorComponent with instanced UObjects and a variable that is a type of a child of itself is opene ...

Cannot not add child to horizontal box after drag and drop

UE - Editor - UI Systems - Apr 28, 2016

After dragging a widget around, a horizontal box will no longer accept children ...

Import overwrite Yes to All/No to All broken

Tools - Jan 4, 2017

This is a painful bug for audio, because many times we are replacing hundreds if not thousands of files this way. ...

Crash When Playing After Setting Size of Retainer Box to Minus

UE - Editor - UI Systems - Nov 25, 2019

Retainer box has minus size occurs crash when PIE, standalone and package.  Probably, we should add any codes for adjust size to 0 or more to  URetainerBox::SynchronizeProperties(). ...

UWIdget classes with missing ReleaseSlateResources() overrides

UE - Editor - UI Systems - Oct 7, 2015

UListView, USlider and possibly others don't have ReleaseSlateResources overridden despite having shared pointers to stuff. ...

MaterialProxyReplace node does not work with Approximate setting in HLOD generation or Actor Merge

UE - World Creation - Worldbuilding Tools - HLOD - May 15, 2023

This is the same behavior for HLOD generation of World Partition. Replace is useful when there is a material that changes parameters with information such as camera. ...

Duplicating an actor that calls a custom event from another actor receives compile error

UE - Gameplay - Blueprint - Jun 23, 2015

Duplicating an actor that calls a custom event from another actor receives compile error until the node is removed and replaced. ...