Custom UVs don't store information properly in layered materials.

UE - Rendering Architecture - Materials - May 9, 2022

[Link Removed] I have this set up so that FX artists can stack UV manipulations, so I don't want to just have all the UV manipulation in the layer with the base color, even though that does give me ...

Cannot build project for the Development configuration after adding a new UFactory code class

Tools - Apr 13, 2018

Adding a new custom UFactory code class to a project results in no longer being able to build the project for the Development configuration. Prior to adding the UFactory code class the project can b ...

EQS Overlap test no longer recognizes custom Collision Object Channel

UE - AI - Nov 12, 2019

Environment Queries Ignore tests for Custom Collision Object Overlaps. Note: The expected behavior seems to have worked in 4.21, After following the steps to reproduce, I can verify a successful de ...

Delta struct serialized fast arrays replicating new elements with no changelist

UE - Networking - Jun 14, 2021

There is a scenario where delta struct serialized fast arrays can replicate changes that introduce additional elements to the array, but without changelists containing the new data. This needs furt ...

Certain UPROPERTY values are not updated during auto-recompile

UE - Gameplay - Blueprint - Aug 4, 2016

Sometimes manual recompile is required to make a blueprint actually recompile data-only changes, but not always. If the last manual compile was with default values, then changes are not updated. If ...

Struct with a single unaltered element will remove the element from the struct on compile

UE - Gameplay - Blueprint - Oct 7, 2015

If used inside a UMG Blueprint, a struct that has only one element will remove the element from the struct after compiling the blueprint. If the element is edited or a second element is added then ...

~FStaticMesh() can crash with race condition

UE - Graphics Features - Mar 21, 2017

UDN user reported frequent crashes in FStaticMesh::~FStaticMesh() on DrawListLinks[i]->Remove(false); Crash went away after adding critical sections to FStaticMesh::LinkDrawList(), FStaticMesh::Unl ...

App on Gear VR crashes when trying to join a listen server as a client

UE - Platform - XR - Dec 10, 2015

If the user tries to join a listen server with an app that is running on the Gear VR the App will stop working. ...

Blueprint Projects can't make APK without compiled .so Error when packaging for Android with any Plugin Disabled

UE - Platform - Mobile - Sep 5, 2018

Blueprint Projects can't make APK without compiled .so Error when packaging for Android with any Plugin Disabled. Also seeing Gradle errors if SteamVR plugin is disabled. Setting min version to 14 ...

UE-47779 - Crash exiting packaged PlatformerGame while in the Main Menu

UE - Gameplay - Jul 27, 2017

This was occurring when I quit via the Quit button in the Main Menu GUI. I also repro'd this using the "Quit" command in the console. I found this on Linux, but this was repro'd on Mac and Windows ...