It has been an issue that I have reported on and off for the last 5 years that I have had comcast and nothing has ever been done to fix it yet. Start complaining to your State Dept of Telecommunications with dates times station etc information.. That may help to get some attention on the issue. I noticed that the comcast commercials were the loudest. I always have the remote close by so I just mute until the show resumes. Interesting that when I had FIOS in another area this was never any issue.