Unreal Engine Issues

UResavePackagesCommandlet::CheckoutFile() logs warnings for skipped files

User reported. UResavePackagesCommandlet::CheckoutFile(const FString& Filename, bool bAddFile = false, bool bIgnoreAlreadyCheckedOut = false) has a parameter to ignore files that are already ch ...

MoviePipeline: Incorrect Caching of Min/Max World Delta Time

To test this issue: Create a C++ class WolrdTimeDilationDebugActor.h in your Project with the following code:// Copyright Epic Games, Inc. All Rights Reserved. #pragma once #include "CoreMinim ...

Data validation fails after renaming a Blueprint Actor while the Game Features Plugin is enabled

This is a regression. Tested in //UE5/Release-5.0 CL20979098 Data validation fails after renaming a Blueprint Actor while the Game Features Plugin is enabled. ...

Debugging Motion Matching in 5.1, looping animations don't loop root correctly

Just trying a few simple animations in 5.1, I have a few short looping cycle animation that go in different directions. I see very bad results and it looks like it's because of how MM is assuming th ...

World partition mini map fails to build with an Unhandled Exception while using r.Raytracing.Nanite.Mode=1

This is a regression. Tested in //UE5/Release-5.0 CL20979098 Build mini map fails with an Unhandled Exception while r.Raytracing.Nanite.Mode=1 is enabled in the DefaultEngine.ini. ...

LOD ScreenSize per platform is not reflected in the mobile preview

in 5.0 or 5.1, MinimumLOD  per platform can be previewed in the mobile ES3.1 preview mode, but It seems that the LOD ScreenSize per platform is not reflected in the mobile preview. ...

MRQ - Groom Issue with Stencil Layers

There is a problem with rendering Grooms bound and attached to animated skeletal meshes when the mesh belongs to a stencil layer in both the Deferred Renderer or the Path Tracer. The groom does not ...

Interchange: racing condition when InterchangeWorker.exe is not built

Animation Layer Interface content filter overrides other content filters

Animation Layer Interfaces are overriding the filter making it so only that asset type is visible even when paired with other filters.  There is an exception to this with the blueprint interfaces fi ...

In Android, the UI does not fill the entire screen and there is an empty space

After migrating to version 5.1, the UI does not fill the screen and there is an empty space. Please refer to the attached screenshot and test project. tested device : galaxy Z flip 3 ...