I am not on 800 but i am on the new app (or was) and the app when i got near a NFZ disabled my intelligent flight modes and smart RTH and told me i had to manually fly back, what happens i have have a full disconnect at that point. with no RTH i am stuffed.
i just switched back to my android (was on ios) on that i have the old app and everything seems ok again except the F&&&&& wind warnings that i got rid off when i uprgraded to 600.
i have not given up hope on the Mavic yet by a long way but i have cancelled the Inspire i was going to buy and will probably cancel the spark order too.
i will play out the Mavic until the end (i live in a city so eventually it will be a complete no fly zone).
i am lucky now to find 300m of space to fly in near me.
I will probably leave both my drones in Thailand now and just fly out there when i am there.