Need advice on a problem with Dji Vision app on iPhone 6. The version is 1.0.48(1677) that I loaded twice. While I am flying, the app just shuts down and the phone defaults back to the home page. This was duplicated several times while flying until I got it back safe. Then set up everything again and set it on the counter and after about 5 minutes, did it again. Tried just the phone without anything else energized and the phone held the program as it should. Any expierence with this type of problem or what is making it happen? Tried searching the forum but too many Dji Vision app post to search.