I don't think it's a phone issue it's more than likely down to software ware or your phone provider junk apps. I've got an S7 edge unlocked, unbranded running on EE in the UK and I've flown all my flights with it with no problem. I know that doesn't help you but it might be a help if you know that it's not all S7's and that it could be down to your carrier or pre installed apps.
Thanks Ian, was asking for a friend, he's not the only one that's having issues. Your only the second person with this particular phone that's NOT having this problem that I know of. I just received him to get a tablet, lol
From my understanding it's an update by Samsung to was put out for the s7 and s7 edge and affects dji go and litchi apps and can only be fixed on Samsung's end. I found out about it by reading reviews on play store. If you go to google play and type in litchi the open the reviews you'll see tons of them stating that very issue your describing and Dev response is what I mentioned and they put a link to a djiforum that describes the issue as Samsung's recent update to s7/edge and how it's messing up go app. So it's both go and litchi. Hope this helps