My P4P frequently disconnects from its controller. Says Aircraft Disconnected on the app. If I power cycle the controller it then reconnects, usually by the time it starts flying Home.
It doesn't have to be far away for this to happen. Less than 500 feet.
It is the App crashing. You still have control of the AC.
Apparently it is a bug in the GO4 app.
I had a P4P and it did it. I now have an Inspire 2 and a Spark and it does it on both of those.
The common denominator is the App.