Unreal Engine Issues

In-Memory replay checkpoints incorrectly deleted when stream length is less than TimeBufferHintSeconds

The buffer start time is calculated by subtracting the TimeBufferHintSeconds from the stream length: const uint32 BufferStartTimeMS = UE::LWC::FloatToIntCastChecked<uint32>(FoundReplay->StreamInfo.L ...

[Task] Automated Previous Transforms

Correct motion vectors are required for things like anti-aliasing to work. Currently ISM/HISM don't support tracking to do this automatically. This is a frequently reported problem for licensees and ...

Level Blueprint's Parent Class can be set to another Level Blueprint's generated class

You can assign the Parent Class of Level Blueprint to be the generated class of another Level Blueprint, which gives you the following "Graph is linked to object(s) in external map" error if you try ...

Threading bug in scene capture component

void USceneCaptureComponent2D::CaptureSceneDeferred() { UWorld* World = GetWorld(); if (World && World->Scene && IsVisible()) { // Defer until after updates finish // Needs some CS because ...

[CrashReport] Game mode crash in UE4Game_Win32_Shipping!TStaticStateRHI

This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below.Error message: Access violation - code c0000005 (fi ...

Xcode build will fail if project has a file that was added by the Editor that contains a Copyright (©) symbol

Code class files created by the Editor that include the Copyright symbol (©) are created with UTF-16 encoding. This encoding is not supported by Xcode on Mac, and will result in a build failure. In ...

Editor crashes when assigning Landscape layer info while Forward Shading is enabled

Crash occurs when Forward Shading is enabled in Forward Rendering Options User noted that if "Support Stationary Skylight" in Project Settings > Rendering > Shader Permutation Reduction is disabled ...

Global illumination Postprocess settings doesn't affect Reflection on Mobile

Postprocess GI related settings look like working in 4.22 on Mobile now, but seems buggy, Not sure if it has supposed to be supported on Mobile since it has no any info in Doc or 4.22's release note ...

Editor crashes when using decal material on Instanced Static Mesh with Raytracing

This issue can occur when setting the Decal Material to Instanced Static Mesh in a Raytracing enabled project. (If there is a cache, it will not crash.) The cause is that DefaultDeferredDecalMateria ...

Scene capture allocate internal render target