We have a 2017 FR3 and the over cab bed lowers and raises mechanically, latching into the brackets. It stopped raising/lowering all the way, got motors replaced and now the bed won’t latch into the brackets to lock. Now the bed won’t lower all the way. Mechanic told us it locking in the first place was the glitch/error and this is as good as it’ll get. Are the beds supposed to lock mechanically? Has anyone had and solved this problem? Please help