The water spray in the first scene with the dragon also wasn't working as late as our Sept. 2014 trip to Diagon. That works fine now. Everytime we ride Gringotts we notice stuff we missed previously. One thing we noticed on this trip for the first time is when sitting on the left outside row of the second car, the cavern looks right below your feet and the troll actually appears to be on the side of the car next to you. Gringotts just grows on us. Every seat has a different view and experience of the ride.