MacOS Catalina/Safari Upgrade no streaming in Safari

I seem to remember having this issue before and I think it is related to Safari/browser versions being restricted by Xfinity but after upgrading my Mac this afternoon, I can no longer access live video streams via Xfinity in Safari Version 13.0 (15608.1.24.40.4).  I can view them in Chrome (which is a released version).

There is no error message just a black screen once I click on a listing in the guide.  

Can anyone confirm that beta versions of browsers aren't supported for Xfinity streaming?