When setting the microbe musher to repeat a recipe, liceloaf in my case, it completes the recipe a few times and then stops working as intended. It still "works", but it's almost as if the chef or cook will ignore it. It sits idle until someone else has nothing else to do. Queuing up recipes individually works as expected, but the continuous mode doesn't. Also, once the breakage occurs, the only fix is to deconstruct and rebuild the machine. Once replaced it works normally for a time.
EDIT: I don't have any logs to post, no crashes, or anything of that nature. The bug isn't one related to efficiency, slowness, or hardware issues, so none of that's relevant... and a screenshot simply wouldn't record the problem. I don't know if I can make a video or not, but that's the only way I can think of to really document the issue beyond simply describing it.
Build a microbe musher, have a duplicant assigned to be a chef, and set the machine to continuous output of liceloaf.