IOStore : Packaged game crashes when doing garbage collection right after cancelling async loading by UnloadPrimaryAssetList

UE - Foundation - Core - RuntimeLoader - Mar 15, 2021

Packaged game without IOStore never hits this error. ...

Blueprint "Diff Against Depot": Restoring an instanced object results in reference to the object in the temporary diff asset

UE - Framework - Blueprint - Feb 19, 2024

When diffing a blueprint against depot via the Content Browser context menu action "Revision Control > Diff Against Depot", restoring an instanced object property from the depot version results in t ...

TakeRecorder cannot record Auto Activate and Destroy of Niagara effect

UE - Niagara - Apr 1, 2024

When Niagara FX of a recording actor is spawned during taking a record, that FX behavior must be recorded and able to be playbacked. However, Niagara Component Auto Activation by BP node is not reco ...

Crash occurs when a struct containing an instanced object property is used as the value for a TMap in a class that is subclassed in Blueprints

UE - Foundation - Core - Mar 23, 2017

Using a struct containing an instanced object property as the value for a TMap results in a crash if a Blueprint of the class containing the TMap is subclassed and the child Blueprint is opened the ...

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 ...

Deleting a project also deletes content of folders referenced by a Windows symbolic link

Portal - Jan 11, 2018

Deleting a project from the Epic Games Launcher will also delete any files that are located in external folders that the project includes via symbolic link. In this case the only thing that should b ...

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] ...

Resetting MovieSceneObjectBindingID property can't update display

UE - Anim - Sequencer - Apr 19, 2024

When reset a MovieSceneObjectBindingID type property, the display of the property is not reset but keep the value before reset, until the property form is clicked. [Image 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. ...