Issues like that may happen because of a false trigger, can happen if you "replay" the story.
My experience says, stuff like this is usually found short after releases and such code fixes come fast with patches.
Worst case I'd say, let's try again after next patch.
Same problem here but 4th drift race.... Entering in last 2 corners in tunnel and i see only the road, no other space (if i go off the road i fall down and game is freeze) I finnish the race by driving on road, then take all rewards and then the loading screen shows up and game is crash...
Sorry guys. If it makes you feel a bit better, I had the same issue with the last Drag race.
Can't tell you more at the moment, just... stay tight, :-)
