Thank you. I will try thisI fly the same set up. Here are a few suggestions to help: 1) Turn your video transmission from HD down to standard. This is the video that gets sent from the done to the controller. You can find this setting in the Go4 app under the controller icon.
2) After you have cached the map but before you take off make sure that all other apps on your ipad are shut down and then turn the ipad on Airplane Mode.
Hope this helps.
I had that issue on Ipad 4 mini.I used these instructions and it cured that in addition to the freezing that was happening often.https://www.djidronenews.com/how-to-reinstall-dji-go-on-an-apple-device/
I got a Samsung Tab A and it worked fine. I finally went with a Smart Controller and use the Samsung for recipes!Have you got any recommendations on which Android tablets are any good. I have seen a list of DJI Recommened ones but these seem quite old. I would like to buy a cheap 7inch tablet.