Trouble with Group Training Rides

Hello! I have a Wahoo Kickr 2018 and everything works fine with races and group rides. However, when I join a Group Workout, my Kickr does not seem to communicate with the Group Training Session. At the start and within a few seconds the other riders pass me and I must end the Workout. I pedal in the largest gear and the Kicker feels like I have no resistance…and I’m prompted to add more Power.

As with my other rides, I ensure that everything is synced up before entering Zwift. This only happens with Group Workouts. Everything works fine with races, group/training rides. Thanks in advance for any help.