2020 Impreza 5 door. Lately the rear gate will not lock. Either at the gate, by the lock button on the driver's door. or by using the fob. The fob works for all other functions. I'm looking for a way to do whatever is necessary to get the gate to lock. Obviously this is a problem especially when you are shopping at several places and want the gate to be locked to prevent theft. Is there a fix I can do or is this something for the dealer?