Unreal Engine Issues

SignedArchiveReader may request wrong number of chunk blocks

This problem is caused by an incorrect calculation of the number of chunks in the read request. Here is the workaround applied by the licensee : int64 FSignedArchiveReader::PrecacheChunks(TArray<F ...

depth calculation is not functioning properly on mobile ES 3.1 preview

In 5.1.1, the depth calculation is not functioning properly on mobile ES 3.1 preview, resulting in reflections occurring in areas where they should not. When checking with RenderDoc in ES 3.1 Previ ...

Foliage LOD's Screen Size Can't be Set Higher Than 1.5

Foliage LOD's Screen Size Can't be Set Higher Than 1.5 Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 4827620, 5.1 CL 20024840 ...

Settings related to Supported Agents are not saved in the DefaultEngine.ini

All entries in the Project Settings window are suppose to be saved in the DefaultEngine.ini file. This does not occur for settings related to Support Agents such as Can Walk, Can Crouch, etc. Note: ...

Crash if the number of spline points is less the one spline point currently selected

Spline components with "input spline points to construction script" enabled causes crash when selecting a spline point and reducing the total number of spline points below the selected spline. Te ...

Running the BuildPlugin command results in a warning that ForceCompile is not supported and an error that an item with the same key has already been added

Repro Rate: 5/5 This issue was encountered in the 5.1.0 live launcher build of //UE5/Release-5.1 at CL 23058290 and reproduced by other users. Regression tested against the 5.0.3 live launcher bui ...

GPU-ARM Mali 400 series phones will render an Opaque Unlit Material as black

ARM Mali 400 Series GPUs are rendering Opaque Unlit Materials as Black instead of the designated color. This is a *regression* from 4.10.2.Devices where Issue OccursDevice NameBrandBug Description ...

Note visibility issues in 2025.1.1

Thumbnails get Duplicated with Large Number of Static Meshes in Foliage Paint Mode

When there are a large number of static meshes within the Foliage paint mode, some of the mesh thumbnails are duplicated and do not accurately reflect the correct static mesh to paint as foliage. T ...

Console Command `Stat SceneRendering` is showing incorrect number of Lights in scene

When using the Console Command for Stat SceneRendering the Counter section for "Lights in scene" is not accurately listing the number of lights. In a 4.10 project an empty new level is showing 16 ...