I had multiplay running in Doom Tower overnight. When I got up, there was an error message saying there'd been a problem and I could either go to Bastion or Support. I went to Bastion and then tried a clan boss battle. It automatically jumped into autoplay. When I tried to change it, it said that autoplay was required in multiplay mode! I tried it again and got the same result. This cost me two clan boss keys! Shutting down the game and restarting fixed the problem. I'm running this on Plarium Play on a Windows 10 PC.