I had just over 100 hours of gameplay & most of the towers unlocked. I logged in today to find all my progress gone. 1st it signed me in as guest. I then loaded my progress from the cloud to find all my progress gone. My purchase is still active, but all my towers, resources, upgrades & custom maps & map completion progress are gone. 100 hours of progress just gone. This is a major issue liable to cause players to quite the game all together. Nobody wants to spend weeks playing a game just to have all their progress reset to zero abruptly without any warning. Overall, I really enjoy this game, but this issue is a fatal flaw that needs to be addressed. Its like building a castle of cards just to have a random gust of wind blow it down.