In this test, all doors have access revoked for all dups.
Door permission failed screenshot.
Fully locked doors do work to prevent access.
Starting screenshot #2. Again, all door permissions are revoked, including horizontal dual doors.
Door permission failed #2 screenshot.
Edit: here's another.
Door permission failed #3 screenshot.
I've reported some of these before, and several got fixed. These permissions are still broken even after the door fixes a couple updates ago.
See screenshots for examples