de0u with PDF Viewer or similar doesn't work, I just delete whatsapp and reinstalled it, and I cannot reproduce this again. It would be nice if somonese else saw this behavior.
When the bug was there I can see ALL the photos and the name of the folder (outside the scope), dunno the name because you cannot see that when you pick up a photo, but the full folder was accessible.
Just to clarify I didn't mistype the scopes or added a nested folder.
Thanks for the response.