Speaking from experience, you can win any race, even with this issue. Might just need to learn how to drive the chariot properly, and drift part of the corners.
So just because the steam game version doesn't work the ones who play it from uplay have to wait?
They are both the same version and even if you bought it through Steam you need to run Uplay as well in order to play.
You can even play it through Uplay alone without running Steam although you bought it over Steam.
[Edited by KingEli, 1/17/2018 11:30:43 AM]