If a major network was having that type of technical issue, it would make widespread news. Your issue is rather common. Each channel you receive is on a different frequency. A local Cox signal issue can cause interference for one or more frequencies, causing pixelation and/or loss of audio for the corresponding channels. Contact Cox to have your signal tested. If the tech says there's an issue with the Cox mainline signal, the Cox tech should escalate the issue to have a Cox line tech investigate and make the necessary repairs. If this is the case, you should contact Cox at cox.help@cox.com and report what the tech found so they can follow-up to ensure the issue was escalated. Getting a tech visit is easy but getting a line tech to actually make repairs is more difficult. If you know your neighbors, ask them if they're having the same issue. If they are, ask them to contact Cox and report it too. That could speed up the process.