If a new line is created in the line management, it will not be included in the line selection for the vehicles.
The new line is listed in the depot.
In order to change vehicles from one line to the new line, you first have to send them to a depot.
[de]
Neu erstellte Linien in der Linienverwaltung werden nicht bei den Fahrzeugen in die Linienauswahl (Fahrplan) übernommen.
[de]
At least in the nightly it works ...
r11226
works