Yes! That's the only way to get my phone to work again... At first it can't boot, then it started but it is always showing FC messages, then the only way was to wipe system and start with a fresh flash.
I've the same question, and tried a couple of things, and I can't downgrade correctly! Solution was to wipe everything and install a fresh Xiaomi.eu 8.1.6 version.
After upgraded to Xiaomi.eu Stable 8.2 version, the SMS notification sound stopped work. I'm not notified with a sound when I receive a new SMS.
I've tried multiple things, changing notification sound, enable/disable silent mode, vibration, etc and the problem sustains.
Problem was only solved...
My only concern is related to security! With an unlocked bootloader a theft can do anything with my phone, and I'm not able to recovery it or lock it with my Xiaomi Account.
Of course I've installed a Xiaomi.eu ROM and I'm pretty happy with it. Finally I've Portuguese from Portugal :D
And why we can't do it, do you know?!
Because we are opening a door to anyone to flash a new ROM on my phone if I lost it, right? Security is compromised...
Can someone please tell me if it's possible to re-lock the bootloader after flashing a Xiaomi.eu ROM?
I already tried to do it, but the phone doesn't boot anymore when I re-lock the bootloader.
If not possible, can please someone explain me why we can't do it?!