Driving on slight downslope while braking - My Rav4 will SOMETIMES jolt suddenly

Hello, because this is still a fairly new vehicle with very likely factory warranty in effect – – if it is under 36,000 miles still -- I would recommend that you go over your concern with the dealership service department. They are in the best position to verify proper operation compared against like vehicles. They are in the best position to determine if there is a fault and what needs to be done to fix it at this young age of your vehicles life. Anything I suggest would be a complete guess, so go see those experts especially while you have a warranty in effect.