[d21spike]

All previous log posts were removed due to the presence of sensitive information. This issue has now been removed from add-on logging and shouldn't occur anymore. Thank you to @DarrenHill for help with cleaning up the posts.
 

Okay, uploaded from the other system (win10)

link removed as it contains sensitive info

epg guide is not showing channels (espn, nbc sports network, mlb) 

I took a look at the add-on behavior with your subscription packages and found the issue. The "fix" for duplicate channels affecting users with both Sling Orange and Sling Blue was a bit overzealous and matched on channels that were similar, more specifically in this case "ESPN" was a sub-string of "ESPN Goal Line" and similarly "NBC Sports Network" was a sub-string of "NBC Sports Network-Alt." The add-on version 0.0.85 addresses this issue.

I have checked that I am on manual, running 2 channel audio, and retested. Unfortunately, the buffering continues. Seems like it may be slightly less often, and it recovers within a 5~15 seconds where as before it would have went on for a minute or more. 

Improvement implies it's a step in the right direction but unfortunately also something out of my hands. Can you tell me which devices are affected, which version of Kodi, and your network speeds? Also, if you can grab a log of this event (make sure to be on at least version 0.0.85, see above.) Even if I can't come up with anything maybe someone else might be able to chime in.