I went to launch my P2V+ this morning and it would take off....but then land itself while the warning honked on the pad. I changed batteries, same thing. This was a once-a-year event I was suppose to get aerials of.....and couldn't. WTF did DJI do to my aircraft? Yes....everything is up to date. Yes....Compass calibrated fine. All switches were in the up position. I have about 150 hours flying this particular Phantom. Never an issue. I do the updates and boom....doesn't work. I'm pissed.