Could you provide us the details of the maintenance? We just know it was for improving stability and completing game performance optimizations. Did you make any changes to battles? Crash in a battle is a big problem because you lose the battle, medals, ALL OF THE UNITS that got into battle regardless of the battle percentage. Successfuly winning and seeing the battle summary screen won't help also, if you experience a crash everything will be gone when you restart the game. The major thing about this is losing resources and time to train units again. I hoped this maintenance was to make the battles go on on the server if there happens to be a crash in a battle. Could you please provide us some more info about the 5/5/2015?