https://www.roblox.com/library/4150790265/DNA
When attempting to union the two unions inside of the “FACEMASK” model it gives this error:
Happens only with these specific unions.
I’m not able to replicate it, although in a different situation the union actually completely disappears when seperating. You can use this and try seperating the FACEMASK union.
If it relates, the parts began going randomly invisible around 07/28/2019.
Edit: as I go through different routes in attempting to fix the problem, I see that you guys can’t actually see the facemask union when inserting the model in your game, which is different than what I can see. Here’s a model with working facemasks (for the most part) which will still replicate the issues.