Fire tv streaming

I 

am having a repeatable audio problem with the Xfinity Stream app on my Amazon Fire Stick.

My setup:
• Fire TV Stick software: 8.16.0.4121
• Xfinity Stream app is current
• Connected to my in-home Xfinity Wi-Fi in Highland Park, Illinois
• Fire Stick Device Location is correctly set to Highland Park, IL

Problem:
CNN and MSNBC play normally. When a commercial break occurs, the picture returns normally after the commercial, but the sound disappears completely. The picture continues normally.

Changing to another channel and then returning to CNN or MSNBC immediately restores the sound.

I have already:
• Restarted the Fire Stick
• Changed the Fire Stick audio setting to PCM
• Tested other audio settings
• Confirmed the Fire Stick location is Highland Park, Illinois
• Confirmed the problem occurs in the Xfinity Stream app

This does not appear to be an internet or TV audio problem because the video continues normally and changing channels immediately restores the sound.

I understand similar Fire Stick/Xfinity Stream audio-drop problems have been reported by other customers. Please escalate this specific case to the Xfinity Stream app engineering team and let me know whether there is a known issue or expected app update that will correct it.

I also have a separate Xfinity Stream location-verification problem with certain channels, even though the Fire Stick location is correctly set to Highland Park, Illinois.