Summary:
Not sure if this is would be a bug or a performance issue, so…yeah.
Basically, I’ve had this happen a few times, where the AI will get itself stuck because it can’t decide the order of which area to mine, and it will pick one that is out of reach, and thus…just sit there. Saving and reloading fixes this issue though, which makes it so I can’t share a save.
Actual Results: