I have the exact same issue. I turned off the xfinity public hotspot and, next day, that quantenna ssid showed up.
Can some one explain what that is and how to turn it off ?
My xFi router all of a sudden started broadcasting an WiFi network with the SSID of quantenna (the name of the manufacturer of the WiFi chip inside the router).
I don’t see it anywhere in the app or the router admin screens. Is this the XFINITY public network (sorta) coming back alive but with the wrong name? I turned that off several weeks ago.
Anyone seen this before?