Exact the same problem here. Got my copter on tuesday, did all updates and then I did some flights and on friday the GPS of the Anafi suddenly stopped during a normal flight.
I was wondering why Freeflight told me the copter isn't moving anymore while I had the copter right before me.
Since then, not a singe green GPS anymore, Controller no Problem. 20 minutes on a hilltop without interferences nearby, 45 minutes in my garden on a wooden table,
15 minutes 50 meters above a crop field... no GPS signal.
Did the power button and the in-App reset, nothing changed. I fear the GPS modul is broken. Maybe they have bought some malfunctional moduls :-(
Very annoying because I should do a flight for our local authorities today or tomorrow, later there is no more chance for that.
I asked the Support if there is a possibility to reset the drone to the Situation it was before updating or if there is another way to check the GPS. Otherwise I will return it to the vendor.