Website keeps logging me out

Using Chrome Version 104.0.5112.81.

This happens both on the Xfinity Stream site and the main Comcast site. I keep getting logged off, over and over. Sometimes after a minute, sometimes after 20 or more minutes. I have cleared cache and cookies, waited 10 minutes before trying again. Eventually I can log back on, but only for a short time.

Somebody, anybody, help me figure out why the Comcast/Xfinity site is absolutely unreliable and erratic. And how to fix it.