A few of the channels have always been wonky on plutoTV. Example being MST3000. I received an email today:
"Hello again,
I wanted to personally reach out to let you know that we have resolved all audio issues that you have been facing with the Android Live Channels not working.
The update should go into effect immediately upon relaunching the app - and will be on version 2.2.6.
Simply open Pluto TV app on your tablet and let us know what you think, your feedback truly goes a long way towards bettering our product for you and improving your experiences with us in the future.
Best,
Lauren
-Pluto TV Team"
I submitted this bug report on the 15th, and 6 days later it was fixed. Would be nice if we could some how talk to the "right person" over at slingTV to implement live channels too!