The "Meshes" value of the LLM for dx11 is considerably larger than that for dx12.

UE - Graphics Features - May 9, 2022

We hope that the difference in GraphicsRHI will not cause such a big difference, but we need to make sure that there are no measurement omissions in the case of DX12.  ...

NiagaraEditor timeline folders are not saved correctly

UE - Niagara - Feb 8, 2023

It works correctly in 5.0.3. ...

iOS Quick Launch from the Editor no longer starts the app on device

UE - Platform - Apple - Feb 28, 2024

For some reason, iOS apps no longer launch on device when using QuickLaunch within the Editor.  Instead, it does install the app onto the device, but when it attempts to then launch the app, a messa ...

Post Process Animation Blueprint Crash When Using Blend Node

UE - Anim - Runtime - Anim Blueprints - Sep 24, 2025

When using a Blend node inside a Post Process Animation Blueprint, the editor crashes while rendering thumbnails. The crash occurs because USkeletonThumbnailRenderer attempts to draw a thumbnail wit ...

nDisplay Regression: Public header DisplayClusterViewport_OverscanSettings.h now includes internal header Math/MarginSet.h, breaking clients' code

UE - Virtual Production - nDisplay - Sep 29, 2025

On the nDisplay plugin code, CL 44773085 from August 12 introduced a new struct template TMarginSet and changed struct FDisplayClusterViewport_OverscanSettings to use it. However, the latter is defi ...

HTML5 shows up as black screen in FireFox 32-bit

UE - Platform - Mobile - Apr 16, 2015

Packaged HTML5 games are not running on FireFox 32-bit Version 37.0.1; Some projects will also provide you with a scripting error that appears when you attempt to run the game on 37.0.1 Spoke with ...

Reroute nodes do not work for Pose connections in Anim Graph

UE - Gameplay - Blueprint - Mar 5, 2015

Reroute nodes do not work for Pose connections in Anim Graph It appears to work until you recompile [Image Removed] ...

Spawn actor of class does not work in packaged game

UE - Gameplay - Blueprint - Jul 1, 2015

Spawn actor from class does not work when playing in a packaged game. ...

Behavior Tree "Resume" button does not match other resume buttons in editor

UE - Gameplay - Feb 12, 2015

Resume button in Behavior Trees is a different image than the resume button in other parts of the editor. ...

IOS Certificate Validation problems with packaging

UE - Platform - Mobile - Oct 20, 2014

User unable to use their newly created Provision as they are in a Time zone east of UTC, giving them a time stamp from the "future" ...