I'm having the same issue. Workd well with Android 5.1 based rom. But when upgrading to the 8.1 or 8.2 based on 6.0 the settings app crashes. Any solution for this?
I unlocked my Redmi note 3 pro with the unofficial method. And flashed a modified boot.img to get twrp installed. Will flashing your Roms brick my phone? I guess they are based on the official Roms?