I have been playing for a little while now and have run into this issue three times, the game randomly resets after I play a level or battle another player. I keep my units and upgrades on the field, but everything else (skills, level progress, class upgrades, achievements, units unlocked & unit number) all randomly reset. It is a bit frustrating since I had 58 unit slots unlocked along with all the base units (which cost a lot of gold) and then to progress I have to invest in it all again. It’s the same with skill levels and level progress (it will tell me I cannot play a level I clearly unlocked and played and make me play the former first) but I do keep the class update points (I just have to upgrade all the categories again). I haven’t found any pattern as to what causes this and I am always logged in when it happens. I enjoy this game which is why I’ve tolerated these resets so far but if they continue I don’t see how I can continue to progress in the game and will have to stop playing. If anyone else has encountered this error on mobile and knows how to avoid it I’m all ears but like I said it’s random and gives me no error or shut down it just phases from one level to another and boom everything is reset.