Facebook live with Big Sur update

I updated to Big Sur Tues. May 11, and I have an issue viewing some Facebook live videos - not all. Sometimes I see the caption only, and it's not until someone comments, and I click to reply on the comment that the actual video appears. Which I only figured out today (May 12). On Monday, May 10, before the update, I had zero issues. The only change I've made is the update to Big Sur. Is this a Big Sur thing? Or a Facebook thing? Or me? :)