From time to time my duplicates ignore their professional duties to do someone else's work that has a lower priority in their worksheet.
Particularly in this way cooks prefer to build objects with priority 9 or wear a slime with priority 7 instead of cooking with priority 9 and the highest priority among their works.
Funny but it's the main reason my colonies died.
Attached a save file in which cook prefer to build and mop instead of doing dinner when other colonists are starving. Directly under the printer=)
Steps to Reproduce
As an exampleo you need to have highest priority in cooking for cooks and also have priority 9 blueprint somewhere. I attached savefile mb this would help.
This issue has not been confirmed by a developer yet.