Thank you again @Blitzz. Still i have this problem. Right know i succesfully installed the TWRP [REC]3.6.2_12-Mi12Pro_v6.3_A12-zeus-skkk_7eb71ffe.zip than format and install the last Stable miui 13, but still having this annoying issue of random reboots. Don't know what to check, any idea?