Why does not faces sync between devices

I have over 60 000 pictures and I have worked mostly on one computer for confirming Proposed photos.
Now when I open Mylio on another computer it propose other and sometimes same photo as I already confirmed on the other computer.
Doesnt “Faces” information sync between devices ?

Face tagging is definitely synchronized between devices and not something you should have to do more than once on any device. It is possible that some or all of your library is not truly in sync. You can send a support request from the app (help menu → Contact Support) which will share your logs with the support team and they can then help diagnose any sync issues.