Unreal Engine Issues
Unreal Engine Issues
Switch on custom enum causes compilation errors after Hot Reload
UE - Foundation - Core - Sep 28, 2015If the project is hot reloaded while a Switch on Enum is inside of a blueprint which is switching on a custom enum, the switch will become corrupted. It changes the 'selection' pin to take a Byte pa ...
D3D HUNG crash with Aftermath result: CullLights
UE - Graphics Features - Apr 27, 2017This is a specific subset of D3D HUNG crashes from [Link Removed]. This JIRA is for the crashes with the following results from Aftermath: [105]LogRHI:Error: [Aftermath] Status: Timeout [105]LogR ...
Some textures stretched on Mobile device
UE - Platform - Mobile - Sep 8, 2015User's content is here: "P:\temp\UrbanJogging.zip" "If you start up the game or go into the content, the issue is on Track One, on the first bend on the right. Also be careful with the sprint bu ...
FFT bloom disappears for some kernel/viewport size combinations (survey grid sized for R instead of 2R)
UE - Rendering - Features - Oct 22, 2026FFT bloom (convolution bloom) renders nothing for some combinations of kernel size, r.Bloom.ScreenPercentage and viewport sizes (e.g. 50% and 1024 x 768)Root cause PostProcessFFTBloom.cpp computes ...
[MetaSounds][Wave Player] - Looping sound waves is not sample accurate
UE - Audio - MetaSounds - Aug 8, 2022When playing the two metronome sounds, it is expected that when the 1bar asset loops, it will stay in time with the 12 bar asset; however, instead phasing begins to occur. This does not occur when ...
Collision profiles are reset when blueprint is loaded
UE - Gameplay - Jan 6, 2025In UE 5.5 (and earlier versions), FCollisionResponse::operator== has incorrect behavior where it will detect that two collision response containers are identical if they have the same number of entr ...
Lags in animation when set leader pose component is used
UE - Rendering - Architecture - Aug 2, 2023https://udn.unrealengine.com/s/question/0D54z00009UJv5HCAT/lags-in-animation-when-set-leader-pose-component-is-used From licensee: "USkinnedMeshComponents have the option to double-buffer their bo ...
Specular highlight flickers when moving on Android
UE - Platform - Mobile - Systems - Dec 6, 2022Regression: Tested in UE5/Release-5.0, this issue also occurs so regression is no. ...
Current animation asset is lost in animation preview when a post process anim BP is compiled
UE - Anim - Runtime - Anim Blueprints - Aug 3, 2020UDebugSkelMeshComponent and PreviewInstance are lost current animation asset. There are 2 ways to fix below void UDebugSkelMeshComponent::InitAnim(bool bForceReinit) { // If we already have Pre ...
[CrashReport] UE4Editor_Engine!FPhysScene::SyncComponentsToBodies_AssumesLocked() [physscene.cpp:1271]
UE - Simulation - Physics - Dec 1, 2017This is a common crash in 4.18 and 4.18.1. The callstack shares similarities to [Link Removed], although that has been confirmed fixed in 4.18. Included in the same crashGroup are also a few Ensur ...