As others have mentioned, I've also had issues with the game locking up.
Thankfully this only seems to occur occasionally within the first 0-2 moves of a game, and not later into a drawn out game, so it's not that bad to deal with, just close and reopen the game. I'm really unsure as to the cause, but seems to happen every 2-4 games yea
Edit: happened in the middle of a game after using swap it seems