I had the problem there i smacked the phone on my bed and i was hitting my phone without any reason then i found it was a software problem. After knowing it i started searching for a genuine solution but i didn’t find any but after a lot of reaserch i just solved my problem by reboot. Redmi volume button problem solution Hope this will help you also

I solved this problem how to fix redmi wifi problem I think this is applicable for any redmi device

Hear is your solution how to fix redmi mic problem Go and soon your problem and thanks me later