Magmawalker??
ETA: This is more of an annoyance than a bug, but when selling ore or upgrading in the dojo, the interface automatically closes upon the transaction completion. I think this happens when training level VI is reached, or when there is no more ore to sell. While there's nothing wrong with that being automatic, I think it's still a bit jarring in terms of UX. I apologize if this has been fixed with the addition of clicking outside to close; I haven't had a chance to test it yet!