It’s probably a bug. If this is happening to others maybe make a bug report.
Judging you have Join Surfaces off and you do not reference the baseplate, I would think that it is a bug. Is anyone else having this issue?
I think I found the issue, the door somehow doesn’t collide with any parts except baseplate and players. I’m going to try and see what is causing this.
EDIT: It was an issue with a collision script, all resolved now.