It might be a tough pill to swallow, still, your phone is going to get bricked soon. Ive tired all most all solutions. Be it master reset, trying in safe mode,uninsatlling the recent update, clearing the theme manager. It had a mother board issue, thats y, poco india head extended its warranty from 12 to 18 months even after the production was stopped. you can check the twitter handle.the soc costs about 10.5 k , but the poco ASC are asking not to proceed.better opt for a new mobile.