Xfinity Stream Beta starts in HD and goes to SD on Roku Ultra

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@dsidle wrote:

I recently switched to Xfinty Stream Beta from ATT TV streaming.  I have 2 Roku Ultras.  Internet connection is excellent, in fact one is wired by ethernet.  When I start or switch channels on Xfinity Stream Beta, it starts in HD but switched back to SD in 10 seconds.  ATTTV, Prime, Netflix all can stream HD and 4K with no problem.  So the issues is with Xfinity Stream Beta.  What am I doing wrong?  Why does it keep resetting to SD after launching in HD?  THanks.

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is your TV notifying you the roku switched from 720p/1080p to some lower number?

No notification.  You can just clearly see the stream switches from HD down to SD (image becomes more blurry) after about 5 to 10 seconds.  Occasionally, it switches back to HD after a minute or so, but not always.  Like I said, the internet connection is excellent and this problem does not occur using any other app on Roku.  .