BCD536HP audio stops working

We have 2 new BCD536HP scanners for our radio feed. The scanners work fine for awhile, but then after a day or two there is no audio. I have the channels for our feed on "hold" as that was the quickest way I could figure out to get only the channel I wanted. If I take the channel off of hold and it stops again for radio traffic it will work for a day or two then nothing. Restarting the scanner doesn't help, nor does switching to a different channel and coming back. The only thing that works is removing the hold to let it hear something. I have a picture in our "shack" photos of what the screen looks like with the channels on "hold"



Any advice to keep these running?