When I haven’t watched Sling for a while, like starting in the am, select CNN or MSNBC, It auto goes back to the sling TV Channel Guide. Been happening since end of June. Think I found a workaround for when you start sling for the day. It’s kind of like musical chairs on the stream. Instead of going right to popular channels like CNN or MSNBC or Hallmark, which mostly all users are “sitting on”, go to a less used channel, “empty seat”, like Euronews or France tv. Watch it for a couple of mins then go to whatever and try watching that whatever channel. It’s like you were admitted to the stream. Sounds like a bandwidth problem on Sling.
I have 2x4670RW…10.0.0.0 Build 4209-46 and 1x4660X Build 4209-46 Re: ticket 4369426, audio cutoff issue from May 19, 2021, due to May 12, 10.0.0 upgrade.
Sling TV issues need to be addressed to Sling TV: https://www.sling.com/help/en
Otherwise, verify your Roku's internet download speed is sufficient: Settings/Network/Check connection