Why are multiple channels randomly pixelating for multiple homes

For the past several days, my neighbors and I have been experiencing multiple channels pixelating often to the point where we cannot get back to the channel if we try changing channels.  Power cycling all of the equipment does not help.  You AI system is locked into its mandated troubleshooting process and when it encounters an internal error, you have to start all over again and can never get to a person to actually get something done.  The following are only some of the channels that have issues:  421, 521, 1110, 1459, 1457, 1455, 1438, 1445, 1436, 1488, 1434.