I'm experiencing these exact same issues now. Started noticing it on 03/31/20 while playing Hunt: Showdown. I can see consistent lag spikes from 50-450ms on my windows desktop (wired), Macbook Pro (Wireless), and my brothers PC (Windows 10, wired).
We both experience rubbe rbanding, lag, and lost packets on a wired connection. Have tech coming out tomorrow, so we'll see what he find. Can't wait to be charged when the guy can't find any issues and blames it on my equipment (Oh wait, I already am. I had to play for the "Customer Care" Program for the next 90 days, so I guess its better than the inevitable $75.)
I swear, it would be amazing if Cox actually had competition in my area; maybe then they would be incentivised to improve their services, or offer better prices. I'm currently getting raked over the coals with fixed high prices, while my friends right down the road benefit from unlimited data, 1Gbs right at, or less than I pay for a fraction of that.
Cost complaints aside, I'm having ping issues too.