• Fixed: uploading a photo with several people in it could enrol the wrong face. The
  upload took the largest face in the image, so a family photo where somebody else stood
  closer to the camera put their face into the person's gallery — silently, with the UI
  reporting a successful add. The effect is the opposite of what uploading is for: it makes
  two people harder to tell apart rather than easier.
• When more than one face is present, FaceID now picks the one that best matches the
  person's existing reference photos instead of the biggest. If that person has no
  references yet, or none of the faces resembles them (below 0.35), the photo is skipped
  with a message saying to crop it first — better than guessing.
• Single-face photos are unaffected, which is the normal case.