Oh rebooting the modem (TW Cable replaced it) and the router (I replaced that, as well) were all done over and over and over and over and over again. No effect beyond temporary. It’s a pain in the rear.
Channel surfing on the router has helped a lot, but still hasn’t eradicated the problem completely.
Consumer grade routers are cheaply made and highly susceptible to heat.
Do what you can to reduce the operating temperature by putting it in a cool place and setting it up off of the table. I found a wire rack/stand and so far no issues after four years.
Previous routers only lasted a year or so.