Using IOS app on iPad, latest version.
The GCN workout challenge appeared when I logged into Zwift. I accepted it, figured would do later on in the month.
I joined a KISS race (using the IOS app) and was put in the bullpen. The race started and out I went - but I was in workout/erg mode - the course changes in elevation made no difference etc. The center display seemed to show I was in the KISS race, or at least was showing an end distance of 22 miles or so - I think that only shows up in a race or group ride.
I think when I accepted the GCN challenge it put me in"choose a workout" mode but then it stayed in workout mode when I joined the race? Not sure what happened, but since the GCN challenge was mentioned as new code maybe this is a problem?