I have a solid green screen in my DJI Go4 app.  Also the 3 small bars on the lower right to get into the camera settings does not work.  I have a iphone7.  I have updated the firmware twice.  The DJI Assistant 2 is not on an apple product.  When flying the part of the iphone screen above the green will pixellate when I move the camera.  Sitting inside the top of the screen is good.  Do I have any setting wrong?  Thanks, Joe.