why when creating route is the surface displayed but not if same route is imported

As far as I know the ONLY place where route surface & way types are displayed is in the Route Planner. Once I export the saved route, import again, and edit with Route Planner, the route surface & way types are lost. If I use Route Planner with the original-saved route the route surface & way types are displayed. Can this be improved? It also implies that saving a route to GPX as a backup isn't a full backup. Information has been lost.

original route

identical route after import from GPX - but observe only the chart is displayed