On elite drivo is a false cadence shown and the program works with that shown cadence. You can do what you want, the maximum is 65 rpm and in avg 30-40. It is not motivating to drive with a speed of 10-20 km/h
It seems I have nearly the same trouble.
I have a garmin cadence meter and it’s well detected.
Maximum rpm are around 65 rpm.
My garmin cadence metre is working fine because I see the good value on my garmin watch.
Zwift app looks like the shown cadence is an estimation.
Is it possible to display the real cadence ?
I have also the same kind of issue, with a Garmin cadence sensor.
Generally stuck around 65rpm, no matter how much effort I put into my cadency.
After todays update everything works fine. Hopefully after next update too…