When I win a “hard” chest, my game shuts down after I collect the prizes, and I have to close the game and restart it. And before you ask, I’ve already done your “standard” response! My games, Google and Google play are all up to date, I’ve tried the uninstall/reinstall plan, and still it locks up after every chest and I have to shut down the game and start it again (and sometimes even restart my phone) to get the game to work again.