When driving from Lausanne/Bern in the direction of Chur, the GPS system suggests at Limmattaler Kreuz to continue on the A1 through Gubristtunnel, and continue on A1, which is a detour of over 60km and around 30minutes. Taking the A3 in the direction of Chur and going through the tunnels is the much better option. The system made two further attempts to guide me back to A1, but then finally accepted the A3 as the route (with the significant economies in time and distance).
Did you change the routing options in the settings? What are the alternative routes?
Edit: Livemap routes the correct way.