I don't think that was update-related. It just became super-unstable all of a sudden. Probably a major server issue. (Maybe a server failed, or they got DDOS'd or something.)
Whatever it is it's so annoying, the game crashed on me before winning a game on DD tower event and when I logged in again it was counted as a loss but however the missions were all cleared
Yeah, I got a minor glitch, too. I crashed as I was beating a tower opponent, and it didn't unlock the next opponent as a result despite having multiple of the missions for the previous one cleared. Re-beating that opponent properly unlocked the next opponent again, though.