That sounds like a different issue. The others can’t get any files to show up at all
When you have two movies with the same name they often can get scanned as duplicates.
One shows up but the other one appears to go missing. It’s not actually missing, it’s just combined with the other one and you can’t see it
The easiest way to solve that is to Plex dance the both movies and add the imdb id number to both
Ghost in the Shell (2017) {imdb-tt1219827}.mp4
Ghost in the Shell (1995) {imdb-tt0113568}.mp4