I’ve been playing this game a while and had the title happen quite a few times. I used to only use gruel since it decays quite slowly, but other foods when overstocked.
Now I use gruel for my thralls, so decided to use the two larger cooked fish. Why in the hell did my wheel stop overnight? Plenty of food left.
No taskmaster yet with T4s in the grind, it took 3 days to break them (and one was a T3 taskmaster !). Finally, I realized that when the selected food ran out, so did the wheel. Sigh.
So, the message is the same as the furnace, when the fuel source runs out the wheel stops.
Let that be a lesson to me: one type of food source at a time.