Unreal Engine Issues
Unreal Engine Issues
Ensure condition failed when destroying a Level Sequence Actor on tick
UE - Anim - Sequencer - Oct 18, 2019In Tick processing of LevelSequencActors of World Tick, If you destroy an actor with an actor's ticks, delete it immediately from the LevelSequencActor array. I think that the problem occurred becau ...
Screen Aligned(Velocity) particles deform at low velocity
UE - Niagara - Nov 22, 2019Screen aligned particles with very low velocity will squash in 4.23+ (No squashing in 4.22) Confirmed in 4.25 MAIN at CL 10333042 ...
Material and Animation do not stop even if Game pauses when Material domain is User Interface
UE - Editor - UI Systems - Jan 22, 2020For Animation and Tick, we have confirmed that pausing can be done by stopping Native Tick. But we can't stop with Material. Widget Component can change the handling of time with EWidgetTimingPolicy ...
Attach track in the Audio track of Level Sequence becomes Unresolved Binding when the Editor is restarted.
UE - Anim - Sequencer - Jan 22, 2021It 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, 2021texture 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, 2021Having 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, 2024For 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, 2025When 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, 2025On 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, 2015Packaged 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 ...