I'm fairly certain that this occurs in the live branch as well but I've noticed that my atmosuit count steadily decreases as the suits keep disappearing from my dock. I also noticed that duplicants are somehow managing to get past the dock without needing to equip a suit. I've haven't found a way to replicate it yet as I haven't seen it live, but I have found dupes in places they shouldn't be without a suit. My best guess would be that the suit just teleports somewhere random because I've found naphtha in completely sealed rooms for no apparent reason.
*Save file attached. Be warned that this is an older file that I have edited with duplicity. That shouldn't matter though because I have seen other worlds with the same issue.
Below shows a duplicant path found itself into a room that has an exosuit dock blocking the way. There is no suit there, and so the duplicant should not be able to even try to go there.
Steps to Reproduce
Have duplicant perform tasks (harvest etc.) on the other side of an exosuit dock. Wait awhile & have them use the dock??? Notice that dupes are either on the other side without a suit or the suit has disappeared.
This issue has not been confirmed by a developer yet.