After 30-60 seconds of flight, I get the message: 'Phantom Connection Lost'. When it happens..... I still have control of my Phantom 2 Vision+ The screen of my iPhone 6 freezes to the last camera view. The in-flight fix is to reset the go to wifi settings on the phone and re connect to Phantomxxxx. The camera becomes live again on the iPhone.... then 30 sec later... the same thing happens. over & over & over. Any suggestions? my firmware is current.