Not used Zwift in a while but fired it up today with my Wahoo KICKR. It found my devices via ANT+ ok but when I started to ride the speed was very low, something like 6kph on a descent. I upped my effort and the on-screen ride stopped, it then went a bit erratic and I hit around 45kph and earned a gigawait achievement!
I exited Zwift and fired up the Wahoo app and it showed much more realistic speed at a consistent rate.
Any tips from the community please?