Looks like her memories are no longer tied to her past life~!
My bet is that she has been "remembering" these "memories" for a while, and just hadn't had something disconnected enough to notice the difference in past visions Vs the story she actually read.
I try my best to just look at the chapter number for this reason.
I find them useful, especially these kinds of titles, when revisiting but apart from that, I stick to just number.
Or by what pronouns they use to refer to themselves. Though that would be TL'd as I♀️or whatever.
It's most likely because the word itself is a feminine meaning of priestess