Moderator assigned 'Authored by' when clicking preview on editing a comment

Not sure if this is an problem with AF or the Forum Access module which is what is being used to create moderators.

Had an issue on our current live site whereby a moderator got assigned the 'Authored by' on a comment when they went to edit it. After looking into the issue, it appears that editing the comment is fine (and the 'Authored by' field is disabled) but if you have previews enabled on comments, and it's clicked it forgets who it was authored by and sets the comment to the moderator as if a new comment is being inserted, not edited. Tested on a plain install as well and experiencing the same issue.