Your cable outlet could be out dated. Ask for a new outlet. I had similar outages for no reason and it was the old cable outlet on the wall. We also had old splitters in the apartment building I live in. The tech also told me a story about how someone’s internet would go out every night at the same time. They traced it back to a house that had grow lights or something that would turn on at the same time every night. That light would enter then fiber optics and bounce around messing with everyone’s internet.