Oh, definitely! I had major issues with the networking in my old house, and just couldn’t narrow it down. I eventually figured out that it was a network switch, but when I tested them, all three had intermittent faults. I could plug my laptop into a port on one and have it lose connection, but plugging something else in would work. Plugging my laptop into a different switch with the same cable would work, but a few hours later would fail. That was a nightmare to track down.