Thank you for this post! I can much more easily tolerate an acknowledged bug.
All of my Roku devices are exhibiting behavior where it will begin to play a live stream but will freeze and return to the main menu after a minute or so. My primary TV uses a Model 9102R - Roku Streambar running Software version 14.6.
Second TV has a Roku Ultra also running 14.6 on a Vizio TV and Vizio soundbar connected via optical cable.
The last one is a Roku LE running 14.6 with a Vizio Soundbar.
I attempted all the suggested fixes regarding audi0 settings on both the Roku and in the Tablo app and none seemed to fix the issue as of 9 pm. At the moment (11:45), I cannot duplicate issue. Perhaps it takes time for a setting to propagate. I will attempt this again tomorrow by changing one setting at a time and allowing some time to pass in an effort to replicate the issue and will update you if I find anything.