Bro, your issues won't be resolved by talking on the forums without doing any work yourself. You get suggestions and test it out is how you go about resolving issues.
If I were you, I'd go one step further by using the wipe all option while doing a clean flash again just to eliminate possibilities that it doesn't get flashed properly the first time. Like I've mentioned, alot of people have used this rom without problem so you should try reflash with wipe all first
Please note I have not unlocked or flashed anything on my own. I updated the phone via about > system updates. So it was an official release per say and its completely fked the phone.
If you go to the official xiaomi forum website too. There are many many complaints by people.
I'm happy to system format my phone, but when it boots up again, I'm sure it's still fked cause it's a bugged software release.
It's a joke. If Apple or Samsung release such a poor update, a fix have been released in days. But it's been more than one week and xm hasn't released any fixes
Again I warn all not to update to 8.2.1.
My phone is a China model as I had to install Google app myself. Which was a pain at the start. Google contacts would sync and loads of sync and errors.
Anyways. Never buying xm phones again. Gives you so many things to fix when trying to save a few hundred dollars.