Photos doesn't recognize faces at all
I bought a new mabook pro afew weeks ago, and installed it as a new devices (no restore).
Since I have an iCloud account for many years, I've synced it with my Photos app on a brand new Photos Library.
Took a while to get all the pictures sync, and many hours for Photos to make its magic and analyze all the pictures from my library. After one day of work, the "Peoples" section of Photos is empty, no faces were recognized.
I decided to check to add manually some name to faces, and I could see that Photos see were the faces are, but doesn't actually feed them or group them by the same face. Where I can assign a face to X photos automatically or say that I recognize a face, that Photos didn't.
All the nice advertisement of Apple in that regard seems not to apply in my case...
Yesterday, I upgraded to Mojave, and hope that it will work. No. It didn't work, even by repairing my Photos library (which took again an entire night to re-analyze all the pictures again).
I still have the pictures I have manually recognized, but nothing automatic.
Even if I add a new picture with a face it doesn't work.
So someone has an idea what I do wrong? Is there some hidden settings somewhere that needs to be activated?
Maybe I have deactivated something in the past, and I don't remember having done so. But that would have been several years ago on other devices, that I might not have anymore...
Thank you in advance for your help.
MacBook Pro TouchBar and Touch ID, macOS Mojave (10.14), mid-2018