I've had my good old Mavic Air 2 since June 2020 and I've never tried to modify it or take it out of warranty. It has crashed once in 2021 and it was fine. It continues to fly except recently as it is about to take off, it hesitates, then goes up to the pre-programmed 3 feet, then it goes back and lands without any input. It seems as if the GPS is off because for the first time yesterday, it went into "atti" mode" After this happens so far anyway, I'm able to take off and fly normally. Any ideas? HFTA