Shuji at ZwiftHQ here. Looking at your server logs from the two most recent rides. What I’m seeing is that your Wahoo Speed sensor is connected as the cadence device, and the cadence sensor is paired as the speed device.
What’s puzzling is this is the also case for your previous ride on the Windows machine where you rode Greater London Flat course and things there appear to have worked out ok otherwise.
These are Wahoo’s little oval sensors that attach to your crankarm and rear hub respectively, correct? First: when’s the last time you put fresh batteries in them? If you don’t remember, let’s eliminate a tired battery as a cause.
Second: Would you check if Wahoo has updated firmware for these sensors? Instructions at the bottom of their support page.
Lastly - please go through the pairing screen again and be careful to re-bond the correct sensors.
If you have any issues, would you mind screenshotting these steps and letting us see what you’re seeing?