fingerprint not working


Oct 21, 2019
i hvae k20 pro. it's came with Chinese rom. i unlock it and installed recovery. twrp recovery its doesn't work i dont know why every time i flash the rom it send me back to recovery . i installed orange fox recovery and work. the rom i used was miui 11... but i faced problem.. one of them my fingerprint not working.. after many searching on internet i found post suggest to install the right vendor zip. i tried it and work without any problem till i upgraded to miui 12. the problem start again and i cant find right vendor. all of them send me to fastboot

now im on latest beta every thing seems to work well except add new Google account or change my password or pattern or add fingerprint.. every thing related to security

if i flash Chinese Rom again through fastboot fingerprint work again and no problem at all

any help here?