So I did have lock up problems with the harpy and harpy monks on normal mode. Today I encountered a regular harpy in legendary and the harpy wouldn't leave my screen and all interaction buttons just vanished. So I ended the mission and rebooted. Now the first card of any adventure I play pulls an invisible card that does not reduce the deck number AND there are no card options available to play. When I abort the mission a harpy appears briefly on top of the location deck while the time expends. So, in a nutshell, I cannot play the game.