where will I type the following command? starts from the adb devices.I found a solution and thanks ur info,i uninstall it and no reboot system ui again so far!
this is how to:
use adb command
1.open developer option and click USB debugging
2.connect to ur computer
3.open and and type adb devices
4.type adb shell→type pm uninstall -k --user 0 miui.systemui.plugin
after that u get no reboot ui but the volumeslider turn to aosp like
and……i don't know how to install old version so far but maybe in next update it will go back