Issue with Manual Airlock

This is still happening in 474321. The clearest example in my game was with a small, walled off section to store my food in with carbon dioxide. This in turn was additionally blocked off with a manual airlock. Very often dupes seemed to reset their own animation as well as the manual airlock's. It did not look as if the duplicant always managed to, invisibly to me, finish their task of picking up/dropping off food. Very often it simply looked like they were idling in front of the door.

I have this same problem with mechanized airlocks too. A lot of the time dupes just stand in front of them like they are waiting to open, and there is a huge delay before the finally open. In some cases the door never opens and dupes just pick up another task.