When ever that happens to me I am mostly too close to my car (or sitting in it when doing Hyperlapses) or did not move for a while. What always does the trick is a short turn with the controller to the left and right and it goes white again. Hope that helps in your case too.Had my air 2 for a couple weeks. So far pretty good, my only question is sometimes the directional display in the bottom center goes red and has a slash thru it. It’ll be 100 feet in front of me with nothing in the way and do it. Doesn’t affect flight much but always wondered why it did it.
I have received two independent reports that the problem is due to the compass of the phone turning off after the phone has been stationary for a while. Moving the phone a bit will bring back the radar icon. I have not tried it by myself because I have sold my Mini. Pls try and let us know the result.