I noticed that I get starvation messages even with plenty of food available and everything set as allowed to eat.
So I checked up on the dupe if he maybe was stuck somewhere ... and indeed he was: He was inside a toilet doing his business.
Apparently that counts as being blocked from food, hence the notification.
Not gamebreaking, but kinda annoying,.
Steps to Reproduce
Have a dupe on the brink of starvation go to the toilet.
This issue has not been confirmed by a developer yet.