Yeah, I was going to mention that this has been an intermittent issue for most people.
I just pulled up your support ticket, but let me know if you want me to take a closer look at anything. 
That behavior you’re describing is what happened for me every time a did a TR workout in Zwift. Shows up as a free ride and not associating with the planned workout and leaving a second workout on the calendar with no way to associate the workout.
this was using Zwift on Mac if that makes a difference.
Thanks - no need to do anything I just figured I would share this was an issue for me too months ago. I know a bunch of people who do workouts in Zwift and I’m the only one who has this issue so not sure what’s the problem. Cheers.