There is other annyoing problem - when you trying to upgrade hero stars from lvl 2 to 3, it says "You will lose 1 star if upgrade fails" - i have upgraded and failed - it have not only taken 2 stars instead of 1, but also reduced my upgrade lvls by one (another 2 stars lost)! Give me my stars back, your descreption lies! If i would know i will lose 4 of them, i would newer attempt to upgrade to lvl 3.