Thanks for looping back to confirm this patch fixed it.
For those with lingering issues: please try a thorough removal of all Zwift-related files including what’s under Application Support before reinstalling. Be sure to save your personal best data and any custom workouts. The complete instructions are on our Support Hub.
If this problem persists after that step - please use the Contact Us link on support.zwift.com so we can provide one on one assistance.