Setup is Mac OS + Zwift App + ANT Dongle (incl. USB extension) + Garmin Speed + Cadence Sensor (the actual one). Garmin Connect App is installed but is not running (not even in the background).
Zwift recognizes the Cadense Sensor and shows the rpm correctly BUT it does identify the Speed Sensor but does not show any mph/kmh values at all ALTHOUGH my Garmin Edge + my Garmin Fenix are paired to the sensor and show any values correctly.
What goes wrong ?