I am also having the same problem as many other folks in this forum have reported. The HD channels are no longer available after the release of the new Xfinity app on the Roku. Xfinity app version 1.1.5 Roku software version 7.5.1 Build 4091-28 3700X - Roku Express There is also no option to select the format in the settings in the xfinity app. Thank you so much.
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