When I start the contract named "Hard Hat Zone" in America, the one where you have to do 25sec of airtime and catch up with an opponent, the contract fails just a couple of seconds into the level. Furthermore, when the opponent finish the course, he doesn't show up at the end of the "timeline" at the top right. If I press "B" I can see his ghost running with me instead of being ahead of me, but the contract still fails.

