Same kind of problem in 92691. Lots of correctables/uncorrectables on cable modem, although data rates are decent (usually 100Mb/s for the "150" plan). Most annoying are the dropped connections which kill the VPN for work, and kill online gaming (kids go crazy because a dropped connection looks like you quit a match, and you get banned from the game for a period of time!) Checked connections as best I could. Emailed email@example.com just now.
Cox replied to my support email very quickly with a suggestion. Have not been able to try yet since it involves connecting computer directly to cable modem (which means no router, so no internet for anyone else!)