Typically they ask for new photos when they do not meet their requirements. After having seen other people with similar timeline being asked to re-submit (including myself), I guess that photos older than 6 months are not valid for them. We were requested to resubmit photos by mid december, resubmitted them and still waiting again for some updates, even though I have lost my hope...No, I have not received any request. Why should they ask for a new photo?