You need to tell the tech rep to send a reinitialization signal to your modem. Had this issue. Bet many of the station you are not getting are channels you would not get if you were not at home but using the app on your phone thru your phone providers internet. Or you may not get any channels at all on say a roku.
They do something somewhere on the network that causes this. A update or some type of reset that corrupts the modem registration even though if checked it looks fine in terms of reg Mac address. But sending that signal does it. Its not a simple modem power cycle command.
