Files displaying in Preview in Files app?

[kat.hayes]

I have a folder of pdf Files in the Files app and I just noticed that some of these same pdf Files are being displayed apparently as duplicates inside the Preview app. I tried to move the files into my folder of PDFs and I received an error message. Is this a bug?

 

[The Mad Hatter]

I had some finicky files like that. What worked for me was to copy the files over (not move), and then delete the originals.

I don't know if this is a bug or a permissions problem.

HTH