Dupes steal food from chef

It took me a second to realize this, but my dupes are stealing food from the chef's hands.  Now, I am basically starving my dupes currently, but here's what I understand to have happened.

Farmers drop three shrooms.  I notice we have 7,200 kcal suddenly available.  I queue up 3 fried shrooms and send my chef to work.  Then I lose track of things for a moment.  When I return to the chef, he has randomly stopped cooking and is idling without an idle indicator at the grill.  I poke at it for a moment, realize that we've eaten all the other shrooms, and wonder...  I release the queue'd fried shroom.  Off he bolts!   ... and there ain't a mushroom to be found.  Two of my dupes were currently gnoshing away on what the cook was in the middle of cooking.