Unreal Engine Issues

Actors disappearing after saving a large number of modifications to world partition maps

From Licensee: "We've encountered a world partition bug where newly created actors go missing in the viewport and Outliner after saving modifications to a large number of actors. This bug is partic ...

Blueprint Interface Implemented and Inherited Interface naming is reversed

Naming for Inherited Interfaces and Implemented Interfaces is reversed in 5.1 and Main. Inherited interfaces act like implemented interfaces, and inherited interfaces appear listed under Implemented ...

Editor crashes after executing the command r.DisplayInternals 1 or r.DisplayInternals = 1

This is not a regression. Tested in //UE5/Release-5.0 CL22346211 Editor crashes with an assertion after executing the command r.DisplayInternals 1 or r.DisplayInternals = 1 ...

Shader Complexity viewmode is not displayed correctly in the material editor.

Floor is correctly displaying Shader Complexity. ...

Server using -useperfthreads command line causes crash if rendering thread is required for function execution

Auto-creation of SmartObjectCollection is often undesired

Right now whenever a new world is created in the editor we automatically spawn a SmartObjectCollection actor for it, regardless of whether there are SmartObjects on the map. The SmartObjectCollectio ...

Fbx scene importer: memory corruption

Material Editor: Highlight/Isolate should warn user when using Nanite Mesh

Editor should visually warn the user that this feature doesn't work with Nanite, or that the Nanite Preview mesh needs to be enabled (or forcibly enable it when they attempt to use this option), oth ...

[MetaSounds] - Inputs, Outputs, and Variables are not allowing spaces in the member name

UE does not allow to have spacing for array in MetaSound PatchThis occurs in MetaSound Source as well Regression checked and occurs on //UE5/Release-5.1 @ CL 22805038 - P4V Repro Rate : 4/4 ...

Building Packed Level Actors causes references to break in the Packed level Actors' Blueprints

This is not a regression. Tested in //UE5/Release-5.0 CL 20979098 Building Packed Level Actors causes references to break in the Packed level Actors' Blueprints. Rerunning the Build > Pack Level Ac ...