Unreal Header Tool can sometimes fail if an Engine plugin is Enabled By Default and has the "Program" Module Type set

UE - Foundation - Core - Feb 15, 2018

An Engine plugin with the Program module type and EnabledByDefault set to true can cause the Engine to fail to build successfully due to UHT failing. I was only able to reproduce this behavior using ...

Keep Simulation Changes will persist only a subset of changed properties

UE - Editor - Jan 10, 2025

As per the steps to reproduce, Keep Simulation Changes will often only copy back the most recent property changed on a simulating Actor back to the version of the Actor in the Editor level. It is no ...

GeneratePsyms fails with installed builds due to missing dymp_syms tool and incorrect path space handling

UE - Platform - Apple - Nov 14, 2024

Uncovered while testing [Link Removed] ...

Dynamically binding 'OnComponent' functions in code doesn't trigger bound functions

UE - Gameplay - Components - Apr 25, 2016

Binding a function in code to OnComponentBeginOverlap, OnComponentEndOverlap, or OnComponentHit does not trigger the bound function from code. ...

BuildGraph build fails if Use Unity Build and Use PCH Files are set to false in BuildConfiguration.xml

UE - Online - Jun 23, 2017

Using BuildGraph to create a local binary build of the engine fails if the BuildConfiguration.xml file has bUseUnityBuild and bUsePCHFiles both set to false. The build fails due to some missing Json ...

Using Delay with Tick when Paused doesn't work

UE - Gameplay - Blueprint - May 28, 2015

Using a delay node in an event graph of actor using tick when paused will not work. It pauses the delay node. ...

ChaosCacheManager is not properly recording the state of each particle when toggling Fields and Anchor Fields in the scene.

UE - Simulation - Physics - Destruction - Oct 22, 2024

ChaosCacheManager is not properly recording the state of each particle when toggling Fields and Anchor Fields in the scene. During my investigations I've noticed that ChaosCacheManager does not reco ...

User's editor crashes when using a certain EditorLayout.ini

UE - Editor - UI Systems - Slate - Feb 16, 2016

The users editor crashes on open when changing the layout ...

Sequencer based Camera Shake throws an assertion when spammed

UE - Anim - Sequencer - Apr 7, 2022

Activating a Sequencer based Camera Shake repetitively results in an assertion being thrown. Assertion failed: DestAllocationIndex != SourceAllocationIndex [File:D:\build\++UE5\Sync\Engine\Source\R ...

Blueprint Node "Get Actors" for Layers in Level Blueprint causes crash in Packaged .exe

UE - Virtual Production - Nov 21, 2019

Blueprint Node "Get Actors" for Layers in Level Blueprint causes crash in Packaged .exe The Blueprint node "Get Actors" for Layers in the Level Blueprint causes an instant crash in a built developm ...