Facebook link share uses most recent comment for description text

I’ve just added the AddtoAny plugin to a site, and it seemed to be working fine. But today someone commented on a post, and I found that the when I tested sharing that post on Facebook, AddtoAny used the user comment as the descriptive text in the Facebook link, rather than using the first few lines of the post.

Has anyone found this to be true?

You can see what’s happening at by trying to share this article: https://www.craigrcarey.net/2011/05/diamonds-in-the-rough-roll-call/

Thanks.