Edit: It seems same track displays fine in my Monterra, so I guess it is down to Galileo app and Edge 1000.
I have created a route with mixed Direct and Driving.
When creating a Track from the Route and exporting it (1077 points) it seems the beginning of the track have just some data points in it so it won't follow the Route at all.
If I cut away half of the route in the end and convert it to a track it has 677 points and it seems to work as expected.
I have verified this in both my Edge 1000 and Galileo Pro in my iPhone.
Is there a limitation to how many points a track can contain when exported?