I noticed today while listening to AM on 40 meters that the receive audio began to slowly fade to nothing after I had been in AM mode for a few minutes. If I switch to another mode then back to AM it will start working for a short time then slowly begin to fade out. If I wait long enough switching modes will lock up the software for several seconds but will eventually start working. Adjusting the main speaker level or the RX speaker level does nothing. I also tried the headphones and still have the same issue. This happens only in AM and SAM modes. I am using a 6300 with 220.127.116.11. Just wondering if anyone else has had this problem.