I'm using ML on my Iphone6 and I've been trying to use my Monster arena building by buying 3 workers. Doing this way I only get a failure message asking for reboot/restart, and when I do that no workers are hired, and my gems are lost. So, this happens to me like 3 or 4 times, and a lot of gems lost and never refunded. Please your help, return me my gems and fix this bug. Thanks.