Rendered mode - Texture maps and mesh vertex colors [BUG]

I think I found a bug.
Roughness map is not working in Rendered mode if mesh has vertex colors.
The same happens with the Metallic, didn’t tested other texture maps.

Tested in the latest Rhino 7 and Rhino WIP.

mesh color roughness.3dm (3.5 MB)

I’m using this handy script to toggle mesh vertex colors:

Thanks @Czaja,

I can repeat the issue so I created a YouTrack item: