Cooking station will sometimes, when full of usable materials, still be sitting in 'Awaiting Material Delivery' status. This happens also with the Microbe Musher, however this has slightly more impact due to it holding already usable food.
Have been able to fix the issue sometimes by either turning on/off a Red Alert or Saving/Reloading, however this instance doesn't seem to be resolving itself for me.
Steps to Reproduce
Supply a cooking station with enough resources to produce a recipe.
This issue has not been confirmed by a developer yet.