I've been playing since launch on the same phone and experience my first issues with the game after 12.0.1 update.

• Blocking results in dashing forward instead of blocking. This happens every few fights, usually when the opponent is about to use a special.

• Blocking doesn't work sometimes. I tap and hold block but end up getting hit with a 5 hit combo.

• Lag. My game had lagged probably once ever before the 12.0 update. Now I can't go a fight without lag.

• Parry timing. Sometimes parry works, sometimes it doesn't. This combined with lag is annoying.

It seems like Kabam ruined the game instead of fixing it post 12.0. They'll probably keep it this way, as it'll probably result in more potions.