>>82263069There's a block from YT's end if it thinks it detects an adblocker and prevents all content (the clock countdown trigger to activate the video stream is part of this, so it just resets as a feedback error) from going out unless the ad plays, but some of the livestreams don't have a pre-roll ad so it just doesn't work at all because the requisite "play an ad" isn't even in the video stream to begin with.
I had it happen literally today on this stream, instead of go live the page just reset the timer. It's the same end effect, you're just describing symptoms of what is most likely a feedback error from YT's end in the timer resetting instead of progressing because of the issue with the player wanting a pre-roll ad but no pre-roll ad existing to play, so it just spits out an error until wholly reloaded.
Of course, I could be wrong since I'm not a YT software or web engineer, but it REALLY seems like it
from my prior experience in software/webdev.