I joined Stage1 last night and when the ride turned left, instead of my avatar turning, it went straight. I could have grabbed my keyboard to try to turn back and catch up but the pack was gone at that point so I gave up and joined a different group ride. On that ride, my avatar correctly followed all the turns.
I was certainly “joined” to the Stage1 ride. I left with the group from the start gate and was clearly wearing the jersey and even after the missed turn it showed me as part of the event.