Smart collections not showing all

I want to create a smart collection for all films written by John Grisham. I have uploaded them (more to come) and he is mentioned as a writer on all the films. However, when I search using the filter, it only shows one even though I know there are 4 films that contain the tag. Any thoughts why? Thanks in advance

Are all those movies in the same library?
In case you’re using embedded metadata in your files… could it be there’s different „spelling“ of the name?

I have worked it out. There was an issue between the keyboard and the server (me). Just a silly error that I didn’t think through. All sorted but thank you for coming back to me anyway.