I have the "Advanced" version and am using DJI Pilot on my android cell phone. Many times, but not always I'm not able to view the satellite view on the GPS. It just shows up as a grid. What can I do to get it back? I had the cell phone in AIRPLANE mode, but then tried it with AIRPLANE mode off, and it still would not show up. Does the GPS come from the controller or from the cell phone? Thanks for any advice you can give.