FOr me Its not that much of a problem anymore. Yes it still crashes, but as long as you make sure you either have your hand closed on your opponent turn, or have t open but don't click on their cards you won't crash. Yes it's not optimal but at least it's playable.
Haven't had that bug. However, for me the game crashes when I get a challenge from a friend and at the same time have an active chat window open in HS. I have to quit the chat quick after the challenge have been agreed otherwise it crashes when I click accept the challenge. I'm on an iPhone SE.