Dropped WAN packets like crazy. Called Spectrum. Took two technicians to figure out the line between the outside box and my Arris modem was bad. I moved it to a backup location (a better RG-59 cable) and problem solved.
Meanwhile I’m wondering what caused the original cable to go bad. Then I recall that some years ago I had to cut it and put two ends on it and a female-female connector. I’m sure the connection steadily degraded over the years and caused noise. Remember kids, always use pre-made cables wherever possible.