Unless there's some bizarre problem at the tap itself logic would dictate that the problem is specific to your residence. What all do you have connected to your coax cabling?
Nothing connected. See above where I detailed out what my run is. No surge protectors, no TVs, no splitters, nothing. I am an HSI customer only.
That is very strange indeed. Something appears to be taking down at least layer 3 connectivity to the modem.