Had this occur before. I have a saved file called (say) "Book" dated May 2023.
I delete it from my Dropbox. I then upload an updated file, also called "Book" but dated January 2024. This must be correct because other people access it.
I then later access Dropbox on my tablet. It shows the old file dated May 2023 which does not exist and not the new file. How can this possibly be?