Update: Removed face pack and the no face issue was resolved. Added the pack back and same players don't have them still. I have checked my pack for faces in there matching the players ID's and there aren't any pictures in there for those specific ID's.
Not sure how to describe this so have attached screenshots. Basically, some of my players haven't got faces on their profiles. I do have a face pack which you will see in the screenshots. Any idea what is going on or what I could do to fix this?