1: Read the Wiki from the link @fnoop was kind enough to provide.
2: post a log from the flight controller from the crash.
He was talking about the sensitivity problem but now I am facing my quad motor just stops for 1 sec or it not spins at a required rpm. I will definitely post the crash log. I didn’t even know why this problem arise because I was flying my quad fine but one bad day this problem automatically generated. I will definitely post the logs in few hours.