Dynamic range window violation

I have had zero Internet issues for years and have been a Cox Customer since forever!  I too have the Arris 8200 cable modem, and it's been installed, reliable, and trouble free for several years.   However, this past week, the Internet has been going up and down like a yo-yo, losing Internet service multiple times per day causing havoc for us working at home.  I have Arris event logs that have "Dynamic Range Window Violation" errors all down the page.  I have just one channel that is listed below the recommended upstream power (44 instead of 45).   Cox has sent signals to reset everything at least twice, and we are still having the problem.  They are coming out on Friday.  If the problem gets fixed on Friday, I will let you know what they discovered.

Someone else with a similar problem suggested that I request a "data technician"--he had the same problem for months until a "data tech" looked at the problem....I'm tired of being a tech support rep.