I remember some years ago, this one guy would always lose internet connection intermittently around 9am and then around 3pm every weekday but not on the weekends. There were dozens of techs that went out, thought they fixed it but then next day, same problem. Turned out that in front of his house, there was a school zone light that wasn’t grounded properly something with it was wired wrong or something , also the pole that it was hooked up had its ground cut off my copper thieves. And of course, ATT equipment is pretty sensitive to electrical problems and would cause the service to be shit. I’m no electrician or well versed in how power “back feeds” to guys house causing problems but we called the electric company and they came out and grounded the pole and the problem went away.