I am currently testing Lightroom CC, and I'm struggling with the face detection. I have uploaded so far 1000+ pictures, and I assigned names to faces a couple of days ago. Today, I have checked again, and for whatever reason two persons have been removed from the person collection. When I select a photo with this person, no face is recognized. What do I need to do to get these persons back? Can I issue a new analysis for the pics that are already in the cloud??