Rear Seat Belt problems of the 2000 Honda CR-V

I have my grandchildren in car saftey seats in the back. They are secured by over the chest seatbelts. When stopping short, one of the seatbelts disconnected directly from the roof of the car. The material on the belt itself did not break, just the connection to the roof. The safety seat jumped forward and hit the back of the passenger seat. Fortunately, no one was injured. The other seat belt also was loosened. Upon taking my car back to the dealer, they reattached the belts to the car roof. I wonder if this has happened often, therefore I want it reported so that in the event there is a defect in all the cars, Honda will repair it before anyone gets seriously injured.