Application crashing a lot

Once again, after a fight the application restarts. The team used in GAC is inaccessible but the characters killed in front of you are back and the score is 0. FIX THIS BUG, ​​it's a shame that you are unable to offer an application that does not crash, or at least does not completely rollback the fight. FEWER NEW CHARACTERS, WE DON'T CARE. FIX YOUR BUGS !