Thanks for the answer guys! I re-installed the game, we made two more battles and the crash seems to be gone. However we still sometimes get out of sync: when I kill one of his pokémon, he sends a new one, but the game is not updated on my side and it waits indefinitely. It happens both ways: sometimes it's him who's waiting indefinitely, sometimes it's me (always happens when a pokémon gets killed though). We both play full screen and we don't touch the mouse during a battle, to make sure the game never loses the focus.
Is there anything we can do to prevent that?
Is there anything we can do to prevent that?
