I think the only problem is the errors it throws, and don't think it is a actual problem other than that, you had them robinb on the first firmware a while back didn't you and it never caused you a problem, i think its just the same sort of thing now for others. Blade even said then he did not know why the sonar was picking up the bad data at high altitude and sending the error, then after the next firmware update this problem never popped up again on any forums, and my guess is the hard work Blade and Ed do relaying our problems back to Dji got this sorted maybe in the the next firmware that came a long. Now after another firmware something similar is happening and it may just be coincidence i don't know, but it will get sorted i am sure and for the time being people can just turn it off for flying outdoors as it really plays now part for outdoor flying anyway, other than a butter smooth landing. ( A quote stole from Blade on this original problem a while back i know) but think he summed it up kinda well so thought i would repeat it for others. LOL