We've received reports this issue is reoccurring. Changing status to active.
There's currently a bug where CycleOps smart trainers may timeout during calibration. If the timeout occurs, it will cause an incorrect resistance level to be recorded with the trainer, so we recommend avoiding using this feature if you have a CycleOps trainer for the time being.
While we're working on fixing this, we recommend using the CycleOps Rouvy App for calibration instead. If you calibrated in Zwift and experienced the timeout issue, calibrating in the Rouvy app will also set the correct resistance level in the trainer again. Instructions are on their website.
We appreciate your patience and understanding as we work on improving support for all trainers.