Loading scenario saved, mistake train player route

[Charlytos]

If play any scenario and don't load it in any point saved, can to finish it well. But if load scenario in point saved, then game continues running well, but after in any point of route, problem between player train route and any AI train router.
In several scenarios played I got problem, loading scenario saved previously.
For my reason, there is any mistake in option Load session saved, that causes those problems!

Your Spanish friend, Carlos