I have it too. The image randomly freezes or the entire playback freezes.But also regular video (not live) has problems, for example it skips forward a few seconds at random moments.I don't know if this is something to report on bugzilla. It's hard to report this because I would have to constantly record my screen while watching YouTube to catch the random moment when it happens.

I have uBlock and SponsorBlock. I'm on Arch Linux.