I had 5 star hero. Had 1 blue medal Ugraded my 5 star successfully to level 6. Go back 2hours l8er as i purchased some gems and he is now 4star? No i didnt lag out an click twice as i only had 1 blue medal to start with.... Spent another 30gems on 3 medals to get back to 5star n each 1 failed... pretty pissed as it was 6star