So this problem has been bugging me for the past 2 months: I've lost sage streaks to it, spacetime fights, SA and other pve encounters and it SOULDN'T exist. It appeared only 2-3 months ago and should be fixed. So the problem is that the game pre-calculates everything 2-3 attacks ahead so you can't sometimes use mysteries on your 4position character and they will carry onto the next turn. I couldn't complete SA solo because hiruzen precalculates his cast and that my character is already dead (while on videos from 3.0 and CN servers show that he can be interrupted) so rip. The next thing is what actually infuriates me is it happening in PVP. So the same situation from matsuri, SWB and spacetime: someone like mabui and mei survive vs shisui or minato or a random character with a dodge passive, so to break it I wait for an attack by mei and then cast mystery, easy win right? No, by the time I press my mystery *on the game is already on the next turn, which plays my mystery on the next one aswell, that leads to shisui/minato dodging and killing my entire team. There is either like a "tick rate" or a "refresh rate" at which the game uses mysteries and calculates attacks because sometimes you can stand there with a casted mystery for a while and sometimes you don't even see the icon pop up.

Tl/dr: The game shouldn't pre-calculate anything. Alll sence of a competitive pve goes away, reaction times are not needed at all, you can't interrupt anything because of that. It didn't exist 3 months ago and it shouldn't now.