On mine at home, looks to be the same in RV, the rivet was broken between the brackets and that allowed the bracket just enough movement to let the level to slip by. When I push the back of the seat back everything went back in place. It took some moving around to find it.
I had to remove the metal frame from chair and put on work bench and I finally saw what it was doing. No way to get a picture from the underside without unbolting frame.
Also my chairs are early 2005 so not sure if they change the frame. There are no adjustments on mine at all, just solid connections with bolts and rivets.