Not sure if this was just a one time thing, but when I went to leave a comment on somebody's profile it made it appear as though I had sent them a bunch of comments at once- and on some of these "repeat comments" my icon got all displaced somehow?
It lets me delete these phantom comments but only up until a certain point, and when I refresh after "deleting most of them" it ended up deleting all of them.
When I don't try to delete any, I'll refresh the page, and the once- say- 5 copies of the comment, turns out to just be 2 comments. (but I blame my mouse for the double post because it's finicky)
Sorry if it's kinda a weird description!
That might happen if you click the "Submit" button multiple times rapidly when trying to post the comment.