I just finished my third ride on Zwift island in which I did not perform as well as the second ride. When I came to a stop after my last lap the Zwift game pulled up the pause screen seen here: https://dl.dropboxusercontent.com/u/39105562/this-ride-your-best.JPG
I noticed that ‘your best’ is blank. It should be showing the numbers from my previous ride. At least I think so.