I saw this twice yesterday. After setting up POI at 398 ft with a radius of 30ft, the flight seemed to go well, but on the second orbit, the App crashed on my Nexus 6. I shut the transmitter down and restarted; system picked up where it left off and I was able to land without further incident.
The second occurrence was with the same basic flight profile; I was on orbit and tried to reverse the direction of travel. App crashed, then there was a "restart" dialog. I hit restart and the app/system recovered well enough for landing.
I was flying a P4, Nexus 6 with latest DJI GO. I haven't looked at the logs yet.
