I have noticed the same thing. Except with different drone models. If I use the Mavic pro (GSP and Go 4) with my iPad
mini 4 I have no problems (except wish it was a brighter screen). When I use the Mavic mini and the GoFly app my iPad
mini 4 just about overheated when fully flying up to 30 mins. It was so hot, I was getting processor power failure and I wasn’t getting a video signal too well. Good to hear that if I upgrade to the iPad mini 5 that It seems to go away. I have also noticed this partially taken place with my
Mavic 2 Zoom (Go4 app) that I use for work. Mavic Pro no problems though. I really think people should know this in advance because it might be more beneficial for someone to buy an older Drone to use with their current equipment unless they want to buy a new drone and new equipment.
Since you have used both, has the screen brightness on the iPad mini 5 really improved versus the 4? Its so hard to see in the sun.