Local co-op, or how to have a stroke in a temple

1. Upon completing the temple, if the console is opened by a player other than the one whose temple you passed through, you will turn gray with shock as you witness your entire temple collapse halfway. Fortunately, this is only visual; I have not verified what would happen if you press the close button.
2. Player 1 opens their temple. Player 1 clicks to enter the temple. You enter the temple. You cannot see the medallions you have. You cannot pick up the medallions that drop. It's similar to entering a previous temple in a past instance. In essence, the system thinks there is a newer instance, and you have entered the old one. Because of this bug, it is impossible to play co-op in the temple.
3. If any of the players die and you leave the temple, you will not be able to enter it again.