Had the rewards up to the coins, and then closed the game. I came back to it a few minutes later and all of the rewards have been reset and I can't claim any of them. Not too bad as I can just get them when I'm AFK or something in the morning, but annoying since it's not the only time the timer has been reset from resetting the game. Countless times I've had to wait for another 1.5 hours for arena tokens because resetting the game causes the time to jump from 5 minutes left to 1 hour and 30 minutes :/