Unreal Engine Issues

[Mutable] Morph Targets can be disabled in packaged builds when Mesh Streaming is enabled

When a Mutable mesh instance is created while the actor spawns at a distance, only the low LODs are generated, and the mesh is created with no Morph Targets registered. Later, when the camera approa ...

Editor crash when an unsupported material domain or blend mode is selected when previewing a Nanite mesh in the material editor

Fix in UE6: 56133257 This Jira is for 5.8.3 tracking ...

MRG - Cinematic Assembly Tokens From Metadata Return Empty When Rendering

Metadata defined on a Cinematic Assembly isn’t accessible as naming tokens when rendering with Movie Render Graph. Global naming tokens defined outside of a Cinematic Assembly does work but context ...

Consistent Crash using Cinematic Viewport on Linux

We are getting multiple crashes on 5.8.1 when trying to use the cinematic viewport on Linux, the most consistent way it's been reproduced is by clicking on the blue frame number to the left of the c ...

Blueprint Independent Rig Modules fail to keep changes to public variables inside of Modular Rigs after closing and reopening the editor

The problem is that when adding modules in modular control rig, I can not change values for module variables - as soon as I close and reload the Unreal Editor, values snap back to default values. I ...

Object with "defaultconfig" cannot be edited in Project Settings if their config section exists in DefaultXXX.ini

Unreal 5.7 Trace server not working on Rocky 8

UnrealTraceServer built on a Rocky 8 machine yields a binary that depends on versions of glibc and glibcxx higher than the 2.28 version provided by Rocky 8.$ ldd UnrealTraceServer./UnrealTraceServer ...

Deadlock while cooking groom bindings

Hi, we are experiencing random deadlocks while cooking groom bindings. We have integrated 5.8 mutable into 5.6 and are still experimenting those deadlocks which seem due to : UE_DEPRECATED(5.4, "Th ...

Scaled Geometry Collections result in a potential memory leak in Physics/ChaosUpdate

Scaled Geometry Collections (GC) result in a potential memory leak in Physics. Tracing the memory allocation of a single run of the Editor and multiple Play-In-Editor sessions of a scene that contai ...