Unknown force is applied to the cloth when changing the skeletal mesh LoD with cloth.

UE - Simulation - Physics - Character - Jul 11, 2019

There are 3 issuesEach particles don't restore its previous position. Which is for calculating velocity by verlet iteration.The previous transform is cleared by current transform. It provides zero v ...

Error: FAsyncPackage::LoadImports for <some asset>: Skipping import PaperTileMap /Script/Paper2D.Default__PaperTileMapActor:RenderComponent.PaperTileMap_0, depends on missing native class

UE - Gameplay - Blueprint Compiler - Jun 30, 2020

User reporting seeing this error start appearing in 4.25.1 (possibly 4.25.x, unsure if they were previously testing on 4.25.0 or not). It appears 'benign' as the expected data still gets loaded, bu ...

Use of SpiralBlur-SceneTexture MaterialFunction in translucent material results in compile errors

UE - Graphics Features - May 8, 2020

This appears to be new in 4.25. ...

MovieRender Pipeline Skips Output Frames during GC

UE - Anim - Sequencer - Jun 8, 2020

This is being seen in the wild... can release a temporary fix until 4.26 when we can change the headers and fix it for real. ...

Regression: External owned Spawnable object disappears when the sequencer movie is finished.

UE - Anim - Sequencer - Nov 26, 2020

Regression: external owned spawned actors stays in 4.25 & 4.25 plus but it is removed from 4.26P5, 4.26P6, 4.26P7 ...

Crash Report Client Editor stops working when launching the editor

UE - Foundation - Core - CrashReportClient - Jul 23, 2020

User is receiving a CrashReportClientEditor has stopped working after launching an existing or new 4.25.1 project.  Issue was occurring in 4.25 as well.  Unable to reproduce.  ...

Directories to never cook does not appear to be working

UE - Foundation - Core - Cooker - Jan 27, 2021

Marking as a regression as this issue did not occur 4.25.4 I've attached project logs and "unrealpak -list" output from both 4.25.4 and 4.26 to this ticket. ...

Reintroduce UE4 Material Layer drag & drop behavior in UE5

UE - Rendering - Architecture - Materials - Oct 19, 2023

This behavior has changed from UE4 to UE5 due to a fix to an unrelated bug ([Link Removed]). Reintroduce the old behavior without causing a regression that reintroduces Ben's fixed bug. ...

COTF has issues with out-of-source projects

It is expected that cooking, including COTF, will fix-up all string asset references. There were a few reasons this wasn't happening, but we should get these fixes into 4.15 as the impact was worst ...

Crash on exit with NULL FTextRenderComponentMIDCache

Suggested fix is to relocate the Super::PreExit() call to the end of UGameEngine::PreExit() so that level streaming can be safely flushed before the MID cache is cleaned up. ...