from what i've seen so far untill now, that crash mostly occur when you use a new unit. Also yes official app doesnt have this issue, so i guess its from the mod itself and just occur on few device
Thanks for your interest.
Actually, the game crashes usually happen when I choose Ki and maybe not because of the new or old units (because sometimes using old units also happens). However, I already have a fix for this problem.
And if anyone has trouble with this can go into "app info" and "force stop" Dokkan (restart device if possible) and reopen it.