sound keeps popping out on CNN only

does not happen on other channels I watch.  not 2, 46, 7, just seems worse on 14=CNN. brief sound dropouts - just a second. makes wathing tv impossible.  My countor box dos not do this.

I swapped hdmi cables. I swapped miniboxes, I removed all settings on visio TV - no surround or sound leveling. just straight settings on tv. my roku, on hdmi2 input does not have any sound issues. So I swapped roku to hdmi1 and cox to hdmi2 - no change.  CNN still bad. Used remote to toggle up and down a channel - no change, rebooted minibox, took batteries out of 2220 remote, reprogrammed that. no change. happens on other tv's. before responding - plz note - my house already rewired by cox tech earlier this year - all the way from street in.  All wired pulled new by cox techs from street to my modem. All splitters replaced. Even old phone box removed from the circuit.  S/N ratio was raised by 6db at modem after a 28 hour hard neighborhood outage for our whole subdivision. So I know there were issues upstream from me at least before. 4 techs have been here in last 12 months or so.  My neighbor had TV issues too with Cox - kept the internet with you - went DISH and his sound and blockyness on video went away.  What do you recommend? Will try anything at this point.  19 year cox customer here.  Ready to punch the wall in frustration.  Thx