Unreal Engine Issues

Removal of ReplacementSceneComponent leaves trashed components during WorldPartitionResaveActorsBuilder

Running WorldPartitionResaveActors builder can detach attached actors. ...

Visual Logger bForceUniqueNames does not result in unique names (regression)

Just a regression introduced with the VisLogger changes. ...

Crash after generating HLODs for merged meshes that have all triangles culled

Light Complexity view mode crashes if there are hair cards in the scene

The Editor will crash if Groom Hair Cards are viewed with the Light Complexity View Mode. ...

Outliner freezes when searching in large maps

This is because SSceneOutliner::FullRefresh is called every time the search text changes, which repopulates the whole tree. There's a few options to look into here (first two might be tricky with b ...

In UE 5.4, some config variables are not getting saved correctly, due to the new User/Editor rules.

A lot of properties are not getting saved correctly to custom configuration files. This looks like that it can be cause by the FConfigContext::PerformLoad function. New conditionals have been added ...

Nanite mesh polygons disappearing when using masked opacity with vertex color in 5.4

In 5.4.3, a nanite enabled mesh with a material that takes its vertex color (R) and uses it as the opacity mask output in a masked blend mode material, causes the mesh to have disappearing polygons ...

ResavePackages fixredirects commandlet crashes Assertion failed: FLinkerLoad::FindExistingLinkerForPackage(Package)

Mismatch of light position and PerObjectProjectedShadows

Per-Object shadows cast by a stationary point light do not appear in the correct place on movable geometry. ...

Crash with WorldPartitionRenameDuplicateBuilder when duplicating a World Partition Level with actors referencing Data Layer Assets