One I might recommend is checking to make sure you’ve got the latest firmware updates installed on this trainer. You can easily do this via the Wahoo Fitness app.
Also, because the Bluetooth pairing feature on Windows is still in development, some issues should be expected. We recommend that you do NOT use the Bluetooth pairing in Windows for important races or rides. We’ve implemented this feature early for users to test and provide feedback here on the forums, so thank you!
However, I’ve also included some recommendations below that may help resolve this issue.
Ensure you have the latest Zwift updates installed.
Ensure you have the latest Bluetooth drivers installed on your PC.
Delete your ‘prefs.xml’ file (This can be found in your \Documents\Zwift folder)
Force reboot your PC.
Perform a fresh install of Zwift.
Hope this helps!