Hello @TJT ,
Our engineers are aware of this issue and it seems to be related specifically to Facebook. I've marked your account as one of the ones affected, and our engineers will notify you directly if and when they have an update.
Since the posts are still going through, you're welcome to still use the social share function. If you don't feel confident still using it, then you can also share your campaigns through the Social Posts tool located in the social share tab. Just copy your campaign's share link and add it to the post.