That happens already 3 times where the Edge 1050 had to recalculate the tour. It stops, reboot and then didn't start the tour automatically.
Sometimes the recalculation work perfectly.
The last time it happen, I was followint a course, the decided to shorten the ride and to navigate to the start using the shorter route.
When it had to recalculate as I was avoiding a closed road, it rebooted. Then I could see the route but didn't realised it stoped recording.
Only at the end when I wanted to stop it, it started recording instead. So I had a straight line at the end.
