Mike,
Noticed this once yesterday (except I have a Rosetta). I am pretty sure that it happened when I noticed I had not set screen lock on my IPad mini 4. I pulled down the control panel, hit lock and within a minute or two looked down to see the screen blank. SkyDemon having given up with no gps. I have location services within SkyDemon set to always if anybody is wondering. I have the latest software all round. I don’t think I have noticed this problem if I stay within SkyDemon the whole flight.
You don’t mention SkyDemon so the above may not be relevant. I am assuming my problem was not PAW related.
The new PAW software is working well over approx 5 flights, I report just for info