Getting performance issues myself (in the form of ~<10fps). Using the latest android on a samsung s20+, All graphics set to max. Before the 4.4 update, had zero issues whatsoever with performance.
There are some noticeable patterns; I have noticed that a lot of the performance struggle happens to occur in certain parts of certain stages, for instance near the edge of Annie's stage, Beowulf's too, but only when its the crowd version, all through Eliza's stage, those are the ones that are the most consistent, but performance drops can happen just about anywhere, that is if I'm not overlooking other recurring conditions or patterns...
When its NOT those stages, It happens to begin at an indiscernible point in the fight, not right at the beginning of a match, maybe about ten or so seconds in, usually when beginning a combo, and will persist for the remainder of the match. Most matches, however, i have zero performance losses, but I find that, when these issues start to begin, they don't stop, and persists through the more resource intensive parts of the menus, and into the next match. Restarting the app seems to reset everything fine, until this issue occurs in game again, and i need to restart the app again
I also crash sometimes, but that's only when navigating menus, not during actual matches. It doesn't happen ALL the time, but as the screen transitions from one menu to another, somewhere between that transition i will crash. Again, this only happens when i continue playing without restarting the app like i specified earlier. Restarting the phone, closing all other ruining apps, changing resolution and FPS settings (for my actual phone, NOT the in game settings), graphics enhancements turned off... everything i do OUTSIDE the app has no effect.
That's all i got for now, ill keep grinding and see if i notice any more conditions for bad fps. thanks.