Submesh textures conflict if two mods share material

[Michael]

Correct me if I'm wrong, don't believe this has been reported here before.
Example mods:
DAF TurboTwin
"DAF Drag"
Both mods share the same submesh material (a90aUID-tracks/turbotwin).
When you spawn both mods, parts of the other vehicle will be white:

Sometimes its the windows that appear white, other times its the whole cab. Doesn't happen with meshes AFAIK.