The last few group rides I have done the Leaderboard is inaccurate. For instance the last ride I did there was over 250 riders. All ride it showed me about 3 from the back which was not the case. I was riding beside the yellow beacon and he said that he was at 150. No matter who I passed or who passed me it did not change. As the ride progressed the leaderboard was not showing all the riders near me. The group ride ended and everything returned to normal. I later checked Zwiftpower and finished 44/103.
It has happened on numerous group rides and on the last two TDZ events.
My wife rode later and the leaderboard seemed to be doing the same thing.
My trainer is a wahoo kickr snap and my hardware is Apple TV, latest gen.