We are aware there is an issue with Multiplayer Daily & Weekly Challenges. 

Multiplayer race wins will not register for the Complete 5 Multiplayer Races and Complete 50 Multiplayer Races Challenges.

Our Team is working hard to fix this, and we will update you as soon as it's been resolved. 

We're very sorry for any inconvenience this may cause you. 

Thanks for your patience and understanding.