I have the same issue, however have some additional comments or perhaps clarification on the same issue:
Routes created a week ago with the PC still work today; I create them on the PC and in the my route app I select "Tracken" / "Tracking", select the route and it shows in the my route app the route points. Then I hit the start button, export to Sygic and it works just fine.
Routes I created in the last days do not work. I create them on the PC and in the my route app I select "Tracken" / "Tracking", select the route and it does NOT show the route points in the my route app. Hitting start button and export to Sygic results in a navigation from current location to the first route-point. Other route points are not shown.
Hope you can fix this so I can continue making new routes and using them on my Iphone with Sygic, since this is the only navigation app being able to be mirrored to Ducati screen.