Hey it is normal that after zwift updates the watts/ power goes down? For example I was 2.8 and now I am 0.9…I cycling harder my heart 170 but in the game I am not moving as before .
An update should not make a difference Zwift only display what the trainer send. Check with a cycling computer and try to recalibrate the trainer.
I am having the same issue, although not to the same extent. Something changed about a week ago and now I’m doing twice to power to travel slower.