I have very reliable internet/router so this would be a rare coincidense.
I just had about 4 feet of bathtub drain pipe (tubes?) replaced. The internet was working throughout most of the plumbers 1.5 hours but after he left… No internet. Rebooting router fixed it up (reconfiguring new pipes?). Counterpoint, the old pipes were severally calcified and the new ones did not speed up my internet.
Considering that an individual fiberoptic strand is sort of a light pipe, and multiple strands are twisted into a cable inside a protective tubular plastic sleeve, and multiple tubes of cables are bundled into a bigger tubular plastic sleeve, I would say that much of the internet may well be considered to be tubes within tubes within tubes. It’s tubes all the way down!