Hi Jon,
I have recently noticed that the stickiness on the desert flats section seems to have been increased. I can be in a casual group of riders overtaking slower Zwifters and often get detached from my group and stuck to the slower rider. It doesn’t feel very natural to have to keep powering up to avoid this situation and feels even worse if I am hanging on by the skin of my teeth to the back end of my group. 
Cheers Jon, keep up the great work. “Ride On”