P: Select All People missing feature segments

That works perfectly! Thanks a lot!

@Roman_Romano  Happy that worked for you:-)

You are just a genius! I just did it and it worked for me. Thank you very much. I recommend everyone to upgrade to the previous version.

@Roman_Romano  To reinstall a previous version of LrC, In the Creative Cloud app in the line that says Lightroom Classic: click on the three dots at the very right end of that line, then click on "Other Versions".

Note, the LrC V 12.X is not compatible with V 11.X. So I suggest you pick V 12.0.1 and see if that works for you.

When will this bug be fixed? It's been a month since the update, but the problem hasn't been fixed. We pay money for the service, but we cannot get it in full. This is a clear mistake, because the masks should not be superimposed one on one and not recognize faces. Is it possible to rollback to a previous version?

Exactly! It is taking more than twice as long, it is actually turning out to be easier to just remask every single image, which means I just went from being able to edit 100 photos in an hour or so, to 100 photos in 3+ hours because I have to fiddle so much with each mask or just redo it completely and they take longer to make now in the first place without the all people option.

I agree! I'm going through a session right now and have 3 masks on top of 1 person. It's pretty frustrating to have to go back through and delete AND remask all the images.

I too noticed this in the new update and I have been trying to figure out how to undo the update. The only options when selecting all people is "entire person", and the only real use in speeding up my workflow with these individualized masks was that I could select all people and then make a mask for ALL eyes, ALL face skin, ALL body skin etc. and then paste that across huge groups of photos. It was amazing. This new update seems to have rolled back the masks efficency back to when we had to update the ai masks for every photo, it definitely feels like a backwards update.

Does anyone know how to undo the update and go back to 12.0? I would rather never update again and keep the way it was before.

Same issue here. Restarted an edit on exact same album. Features for All people only works in the Rolled Back version 12.01. Also syncing individual masks for 3 people resulted in one person getting 3 duplicate masks in the autosync-selected photos: i.e., As labeled "Face Skin: Person 2" "Face skin: Person 3" are actually exactly the same masks as face skin for Person 1 in all the selected photos for Autosync. 

Thank you! Already missing this feature badly! I hope it gets fixed again!