Have made a route for my map which was working fine. Then for some reason the return trip back to the bus station stopped working. I can't remember what I did.
The outbound buses display the correct destination display and passengers board. When the bus gets to the next town it retains the outbound display and returns to the bus station, and no passengers board. The return buses will display Not In Service if you didn't "see" them arrive at the next town.
If I drive the route myself, all is normal until the return trip. Even with the correct destination set, no passengers board the bus.
I have deleted the stops off the trip and replaced them, resaved the map and that hasn't helped. All the stops are correctly assigned to the spline paths, the timetable is correct and there are no breaks in the route track.