When I listen to 462.975 with a PL of 186.2, and the dispatcher sends paging tones, the scanner sometimes cuts out. I relate it to the PL tone and the paging tone messing with one another, causing the scanner to think it's hearing a different PL, thereby muting the audio.
If you are using a PL, try dropping the PL and see if it works better in CSQ. Unfortunately, I can't really do that because there are three other counties nearby using the same freq with different PLs. My scanner would never shut up if I used it in CSQ.
Hope this helps.