Thank you for reply. I've tried the methods you talking about. Sometimes good, sometimes bad. And the compass went crazy too.
I've flashed back to the China stable rom(MIUI9.5) yesterday. Everything back to normal for now.
Same here.
http://www.miui.com/thread-15306132-1-1.html
This twrp works fine. But after the flash process completed, it freezing at the Mi Loading interface. Does anyone have any idea?