Garmin watch shows only cadence data, but not the speed data of the same ANT+ sensor. Same goes for the generic android ANT+ app, which seems to show cadence data, but not speed. However QZ app log ...
I have a Sunny Synergy Pro Magnetic Bike with a Sunny CB110 Cadence/Speed Sensor. When connecting the speed sensor to QZ everything seems to work correctly. My speed, cadence, watts, calories, ...