Unions show as 'neon' material

I have a plastic Union and put a regular texture on it with some image, one face gets the image, the rest turn into neon material.

Some images don’t break like this, some do.

If you need I’ll post a repro when I’m on my Pc again.

I’ve reported this in the past. It’s not great that it’s still around. To help get it fixed here’s a post of mine from an old thread.

Repro place attached:
NeonBugRecreation.rbxl (20.9 KB)