Happened again today, this time after about an hour 10.
Also should point out once It happens (starts with black screen and buffering logo) and once it reconnects to the internet, after a short while of playing the stutter happens usually with playback too.
If you get the issue above, usually after Reconnecting and starting to watch again it will start to stutter during playback frequently so you have to stop and resume for it to go away.
The stutter only seems to happen once you have had the initial issue (from my testing so far)
The stutter happened 4 different times after resuming playback after the initial black screen & buffer. Even after rebooting the tv the stutter would happen if the black screen & buffer message had popped up
I rolled back version yet again and boom, issue solved again.
I can resolve this everytime by rolling back to the non early access version.
But yep this is still happening.
I dread not being able to use the old version as the early access is unusable on this tv/webos (whichever is causing it)
As before someone else had the same issue on a different tv (not sure what webos), so would have been nice if they had commented too but no worries