Autosweepers sometimes just simply stop working. For example I am using a sweeper to fill up a fridge from my food storage, which is unreachable for duplicants. The only food currently cooked are frost buns, and there are about 40.000 kcal worth of it on the ground. The fridge is set to only keep frost buns.
Every now and then, the sweeper will just stop to refill the fridge. It empties, and the duplicants cannot access any food.
This happens to Autosweepers all over the place, seemingly at random. They will just stop doing anything.
Reloading the game fixes the issue.
Steps to Reproduce
Set up an Autosweeper. After some time, it may stop working. It's hard to reproduce intentionally, but reliable happens from time to time.
This issue has not been confirmed by a developer yet.