I keep getting kicked out from the Xfinity Streaming app on my Apple TV 4K

Hello,

I have the latest Apple TV - 4K streaming box from Apple, and I have it connected to my Xfinity Wifi.  I am able to download the Xfinity Streaming app, but after I enter the activation code, on the www.xfinity.com/authorize page, it logs me in for 1 second and then kicks me out.  I should add that I am running the latest and greatest tvOS software on my Apple TV Box. 

I have done the following:

1) Restarted my modem

2) Restarted Apple TV

3 Deleted the app and reloaded it

I think this is an issue with the Infinity Streaming app not being compatible with Apple TV, which is unacceptable!!