Duplicantt in my game has both supply and build disabled but she decides to fetch sandstone and deliver it to a compost that is under construction. Save file is included. The duplicant's name is Supplier Marie.
Steps to Reproduce
Load the savegame and Supplier Marie is in the process of delivering sandstone to the compost. Interrupt her by making her move to near the compost and she will pick up some pollluted dirt and store it because it has priority 9 then once that is done she'll start trying to deliver the sandstone again even though she has both supply and build disabled.
This issue has not been confirmed by a developer yet.