I've repeatedly had dupes stop making food and refining. also noticed lack of ceramic production.
I've worked out that on load and occasionally just out of the blue, deliveries stop. I notice because I start getting 'forbidden food' messages when i've got 24,000 Kcal in mushrooms..
i set the buildings to priority 9 and nothing happens.
for the on load portion, the operators continue processing whatever is in the building and a few more deliveries happen but eventually they stop.
if no materials are in the building they never happen.
to restart deliveries simply make a change to the interface, it does not have to be the recipe in question.
for example, on a kiln I clicked the 'refined carbon' job to one and back to zero and suddenly i had dupes delivering coal and clay to the infinite ceramic command...
as for the intermittent issue.. no clue what causes it but the same steps correct it.
edit: when i loaded back up things worked normally. bizarre. when i saved they weren't delivering to the granulator, the grill or the kilns.
obviously there is something else going on that coincided with my loads in the past..
I currently am only using Kiln, Rock Granulator and Electric Grill that have the new queue system
Kiln, Rock Granulator and Electric Grill with infinite jobs. priority 9. save the game/load it and observe.