According to the API-data the Bus Start and End-Station is always identic.
For example:
REAL: Line 1 -> Stadien to Vorhölzli (how it should be)
API Response: Line 1 -> Stadien to Stadien (it seems like the end-Station "Vorhölzli" is just passed as normal station and the bus would continue the course back to the start-destination.
So whenever you want to see the stationboard of a stop on line 1, it shows you all connections (in both directions) but with destination Stadien.
According to the API-data the Bus Start and End-Station is always identic.
For example:
REAL: Line 1 -> Stadien to Vorhölzli (how it should be)
API Response: Line 1 -> Stadien to Stadien (it seems like the end-Station "Vorhölzli" is just passed as normal station and the bus would continue the course back to the start-destination.
So whenever you want to see the stationboard of a stop on line 1, it shows you all connections (in both directions) but with destination Stadien.