While I was riding yesterday I noticed that the cadence displayed in Zwift doesn’t match what is showing on my Computrainer controller. I also have a Quarq and compared what it got for Cadence and it was matching the Computrainer.
I had first noticed this because I had increased my cadence but the on screen display didn’t seem to go up to what I was expecting.
I found a workaround if you have a Quarq or ANT+ Cadence sensor.
Disconnect CT, let it discover the ANT+ Cadence sensor (or in the case of a Quarq, power + cadence). Shut down the App. Reconnect CT, relaunch, repair power to the CT.