I have a General AP Hill radio that is about 18 years old. Recently when someone near me keys up my meter needle is buried to the right and I can't hear them until I key my mic and "reset" it. I've had it happen while turing down the recieve gain too. It has only been happening for a couple weeks. It happens with a magnet mounted generic whip antenna and with a 3' firestick and 18' of cable. Anyone heard of the before? It's installed in a 2014 Volvo.... Thanks in advance for any help.