Unreal Engine Issues and Bug Tracker

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Latest Bugs

Overwriting an anim sequence may scale the play rate of the anim instead of modifying underlying frame rate

UE - CAPT - Tools - Take Recorder

The frame rate for an anim sequence is not being changed as expected when its being overwritten / re-imported. ...

SetInputMode_GameOnly + windowed mode: Win+Arrow window snapping stops working after dragging window across monitors on multi-display setup

UE - Editor - UI Systems - Slate

When SetInputMode_GameOnly is applied on a PlayerController and the application runs in windowed mode on a multi-monitor setup, the Windows OS...

VSM shadows are missing for non-Nanite meshes in a PPV where Megalights is disabled, but Megalights is enabled in the project

UE - Rendering - Graphics Features

In UE 5.8 r.Visibility.LocalLightPrimitiveInteraction mode 2 (enabled if MegaLights is disabled) was added and made the new default as a perf...

Deadlock while cooking groom bindings

UE - Anim - Mutable

Hi, we are experiencing random deadlocks while cooking groom bindings. We have integrated 5.8 mutable into 5.6 and are still experimenting tho...

Crash in GC - FSharedStruct reachability race condition

This Jira was created from the linked EPS case: =============================================== This issue is caused by FSharedStruct batch...

Latest Fixes

Crash when using ListStreamingTextures with VirtualTexturePrefetchMips

UE - Rendering - Architecture

The ListStreamingTextures command causes a crash in FRenderAssetStreamingManager::HandleListStreamingRenderAssetsCommand when there is a virtu...

Substrate Single Layer Water material fails to compile in blendable Gbuffer mode when using the Single Layer Water BSDF node

UE - Graphics Tools - Terrain - Water

When using Substrate in Blendable GBuffer mode, a material with the single layer water BSDF node produces a shader compiler error : MaterialE...

Crash in GC - FSharedStruct reachability race condition

This Jira was created from the linked EPS case: =============================================== This issue is caused by FSharedStruct batch...

World is initialized twice when opened through the Content Browser

UE - World Creation - Worldbuilding Tools

When opening a Level from the Content Browser, the world gets initialized twice. This initialization process can be quite long, especially for...

Parameter metadata not accessible if modified in Material Instance and then converted to CustomPrimitiveData

UE - Rendering - Architecture - Materials

There’s a potential issue with some changes we made to UMaterialInstance::GetParameterValue (https://github.com/EpicGames/UnrealEngine/commit/...