Latest hypothesis is it's a disruption in the signal from the wall socket.

One of the analog TV channels had snow, another TV channel also started developing a little bit of snow.

Called the ISP/TV company.

They will send new splitter, which splits TV signal and Internet signal.

69 million packets were being dropped in the last 16 days according to the log from the cable modem, which surprisingly was accessable buy the guy on the phone, perhaps partially perhaps fully (cable modem menus accessbility) not sure about that.

This may be the cause of this connectivity problem.

I am very skeptical though, cause I can barely notice it when web surfing or gaming.

Technically TCP/IP should keep re-trying until a connection is established though it does time-out after a while.

I am not convinced that this is truely the cause of the problem.

But it will be nice if the TV signal is better and to start ruling out possible causes.

Another hypothesis is CGNAt, carrier grade NAT.

Diagnosis... to be continued...