Hi, I recently upgraded to CC 10. In my previous catalog, I had used the people mode and facial recognition to identify and tag hundreds of people / thousands of photos. Now, when I view the pictures, the keyword tags (people's names) still exist in the photo metadata, but some of the facial regions (rectangles) on the photos have disappeared. In addition, LRCC has re-run facial recognition on many of these, created new regions and and suggested names OTHER than the actual person. It has also re-created facial regions (rectangles) on almost all my photos, causing an incredible amount of rework to "Remove face region". Please help!
Consider resetting the preference file. The preference file can get corrupted leading to odd behavior. Note that some preference settings may reset to defaults. The preference file can survive updates, upgrades, reinstalls. Resetting is Adobe speak for deleting it, after which, upon launch, LrC will create a new one.