Facebook comments tool - now has 10,000 comment limit?

Hi all - we are running an webinar at fluencyweek.com.br and the comments tool embedded will not pass 10,000 comments, comments are dropped off the back of our quantity of comments, you can tell this is the case by reviewing how many comments we have in reverse order by 'oldest'

I can't find and information on this anywhere. Normally we can have over 10,000 comments on our comments tools no problem.

Asked about a month ago