I've had two cases of "junky signal" to put it for lack of better term over the last few years. My modem would show lots of errors and sometimes reboot or just lose connection.
one required a tech. the line was showing noise, and they started tracing it back through the telephone poles, and they said that like 4 houses down there was an analog tap (or something?) on the telephone pole which he had to remove.
more recently, I had simila issues, but it turned out the cat had unplugged a coax amplifier inside my house (before it plugs into the cable modem). I just had to plug the amplifier back in.
so if this has been going on for weeks before covid, it will probably require a tech. and they may have to work way upstream outside the house.
but check your cat hasn't unplugged anything
