If you are upgrading any of your barracks, and you then try and use crowns to rush your troop training. They will not be available to use. The barracks will show as full but if you try and attack anyone they will not be available until the time they would have taken to build without crowns expires. This bug I have reported 3 times in the app. I've lost approx 30 crowns because of this bug. Nexon know the bug exists, yet do not tell anyone about it. Nor do they refund crowns lost to this bug. This is a disgrace. In game currency lost to a known bug and they refuse to refund. You should be ashamed of yourselves Nexon and your in app support gombeens are a waste of space regurgitating nonsense instead of actually being any help. Getting more and more disallusioned with this game and i'm an Atomic level leader of a level 11 alliance that has spent a lot of real cash on this game. Way to annoy your loyal paying customers for the sake of a few crowns!!!!