I think you are saying that you can add an unconnected profile, but it doesn't show up in the search database. If so, I am also seeing the same thing, and I am using Firefox.
I just added a new unrelated person as a test. I had no difficulty creating the profile. (It included both birth and death dates.)
However, his profile doesn't appear yet when I do a search on his name, nor when I open the surname page for his name. I created some profiles yesterday that were connected to another person, and they showed up on the Surnames page immediately.