For those of you who have not experienced the chest reset bug, here it is. Notice the timer on the Silver chest before VS after I went to watch TV royale. :
Clash Royale, Pay-to-Win Mechanics and Your Wallet | The Lowdown
Clash Royale Chest Simulator - Open Any Chest For Free
Clash Royale Chest Simulator - Open Any Chest For Free
5 Reasons Why You Want to Quit Clash Royale — Deconstructor of Fun