I fly the dash 8 on mobile Aerofly a lot lately. What now keeps happening is the following. When I complete a flight ( stay in the same session) and set up a new flight with navigation etc then I have problems with engaging lnav. The fms shows the flightplan ( so does the green navigation map tool), but the pfd when nav source fms is selected won’t show the next waypoint on the top right corner of the pfd.. So if takeoff with heading select mode and then turn on nav it will show lnavhdgsel. I can manually navigate with the hdg select button as much as I want to and across intersecting the pink flightplan which is there on the pdf but at no point it will grab the lnav. Any ideas?