Permanent fix for Amazon Prime Video connectivity?

I cannot launch Amazon Prime Video from within Comcast's X1 service. I can watch it just fine outside of Xfinity. I can launch Hulu, Netflix, Disney+ directly from the X1 service. I did a lot of research and did all of the troubleshooting steps suggested. Do registered the device with Amazon, unplugged the X one box. I was on the phone with advanced customer support for one hour. They said they finished their troubleshooting, but still no service. The Amazon prime screen just sits there And the three dots at the bottom cycle. 

I strongly suggest that this is a latency or handshake issue between Xfinity and Amazon prime video. When, oh when, will you fix this?

You do realize that every time I exit the Xfinity service and go to direct streaming, it devalues the Xfinity service. Why would I pay for it if it's not working as my hub to other streaming services? It's beyond frustrating.

Will Comcast please identify what you are doing to permanently solve this problem? Or at least acknowledge that it is a recurring problem that you don't have an answer to?