i have tacx bushido trainer and there is an interface problem with zwift app.
Firstly I must enter app and thats ok.
step2: i have to sit on bike spin pedals of my bike to link all sensors with zwift app (ok press auto).
step3. i have to leave my bike and select route to ride.
step 4 I have to sit on bike again and ride.
if you swap step3 and step 2 this scenario become very simple.
I enter app, select route to ride. then i sit on my bike, spin pedals a little, link sensors (auto ok button) and i am riding!