Professional GPS/Homepoint issue on P3P

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Had my first scare with the my P3P today. I calibrated my compass before this flight. Was about 2,000 ft out and 400 ft up in the mountains. Signal started getting a bit weak so I decided to bring her back towards me.

This is when I realized that the Phantom's location and orientation as shown on the map in the lower left area in the Pilot app was incorrect. I knew I was pointing it towards the general area I was standing, but it showed that I was going the opposite direction. In other words, when I tried to follow the map and orient the Phantom towards my homepoint, when I moved forward it started to show it was getting further away.

Fortunately I had a good idea of where I needed to go, but the map in the Pilot app proved to be worthless. Once I was back within about 100 ft of my home point, the map looked correct again. Does anyone know how/why this may have happened and if there is a fix?
 
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If you lost RC signal then the map would not update. But you'd also see a RTH message on the screen if this were the case and the P3 icon would not move at all.
 

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