TV freezing randomly

North of Boston, MA.  Yesterday (3/4) and today (3/5) the television has been randomly freezing - usually just a few seconds to maybe 10 seconds, but a handful of times it has been over a minute.  Picture frozen (or occasionally black), no sound.

Meanwhile internet is fine.

I have 3 TVs, an X1 and 2 (small) satellite boxes.  Freezes affecting all TVs and multiple channels. Cables are fine - at least in the house.  I have refreshed and cycled power on all the boxes:  no joy - freezes continue.

This happened for a couple of days last month too - stopped as suddenly as it started.