Hey Radiobob214, I have a couple questions about your bug.
1. Does this happen when you manually open the shop, when the shop opens on it's own after the time progresses, or both?
2. After you throw away the ingredients does it start to mix correctly if you try to make a recipe again, or is it just stuck forever?
3. The time control is set to automatically self-pause after the shop gets reopened - is it possible that it was left paused and that's why it wasn't mixing? You would need to be pressing one of the right-facing arrow buttons next to the clock or the key 1, 2, or 3 to unpause.