This is probably an already discovered bug, but sometimes when a CPU player needs to make a choice, they may somehow back out and just freeze. For example, on Goomba's Greedy Gala, when you go on the roulette thing that's sends you to a part of the board, it'll attempt to back out (which isn't a option), and it'll do nothing. It'll just sit, waiting for nothing. So the only option is to reset the turn unfortunately.