I want to confirm that even in 2021 I have the same problem with Tacx Satori cadence in Zwift jumping wildly between values of 0, 100 or sometimes even 200+. Battery is good, the ANT receiver is just a few cm from the trainer, other apps don’t have the problem. Really sad that in a year Zwift made zero progress fixing it.
Same issue here! Power info works well, but cadence drops to 0 or jumps between 1 to 140… So sad to learn that there is no improvement from Tacx/Zwift -such a shame…
The cadence is working fine with Tacx Utility and Tacx Training apps.