Xfinity Stream & Amazon Fire TV Stick

Using Xfiinity Stream app with an Amazon Fire TV Stick and getting a location issue on some stations and a please connect to your in-home wifi (unknown SSID) on others.  These messages are coming from the Xfinity Stream app.  I am at home and I am connected to my home Xfinity WiFi and able to run other streaming apps (Netflix, Peacock, Prime, etc.) without any issue.

I've been through 3 different Amazon Fire TV Sticks with the same result.  How does the Xfinity Stream app determine if I'm on my home network or not?