For some reason the history of the track traveled is self-erasing with the passage of kilometers (at least with the latest firmware 10.50)
I calculate that over 50km the beginning of the track is erased and the green START point is moving. I have been making motion captures to see that this was really the case, and not a failure at the point of origin, redrawing, etc...
All the magenta track that appears on the screen should be cyan because it had already passed through that area
