Doors will say "access restriction" in the status tab when there are no restrictions on any duplicants. These same doors will occasionally not let duplicants through it as if there is an access restriction. This bug can be temporarily fixed by restricting and then unrestricting the duplicant's permission, but the issue comes back often. This glitch might have to do with the fact that i have a lot of duplicants that died, yet i have not yet put them in tasteful memorials. Meaning there are a lot of duplicants that appear on the door permissions.
Steps to Reproduce
Set a door to have access permissions. Sometimes, even if your remove all access restrictions, it will still say "access restriction", then have duplicants behave normally, some of them may be unable to walk through the door. Having many duplicants may have an effect
This issue has not been confirmed by a developer yet.