Attach track in the Audio track of Level Sequence becomes Unresolved Binding when the Editor is restarted.

UE - Anim - Sequencer - Jan 22, 2021

It looks like the Actor's Binding information has not been saved successfully. ...

GPU Debug Label is not set on some textures

UE - Graphics Features - Aug 11, 2021

texture streaming is one of the reasons that drop the label but not the only reason. add a line of code RHIBindDebugLabelName(NewTexture, *OldTexture->GetName().ToString()); into FMetalDynamicRHI:: ...

Duplicating skeletal mesh assets with groom in world outliner changes Hair UV layout

UE - Rendering Architecture - Materials - Dec 10, 2021

Having duplicate characters with groom, hair UV layout changes which results in visible shift in character look and also changes color based on camera distance and lights in the scene (hair would fl ...

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. ...

Opening blueprints causes editor to crash

UE - Graphics Features - Apr 1, 2015

Opening any files in folders (attached) cause editor to crash. Crash Reporter: [Link Removed] Frequency: 10/10 In user's project (available if needed), opening the project immediately crashes ...