Some (not all) local files are missing

[kemenios]

Plan

Premium

Country

USA

Device

Desktop PC

Operating System

Windows 10

My Question or Issue

Hi all. I've noticed recently that some (but not all) of my local files are missing from my playlists. They're not available in the list of local files either, despite the fact that they are still in the same folders they've always been in (which are included in my Local File sources), and nothing has been modified in the file name or information or anything... It's like Spotify has stopped recognizing them? But again, only a select few; others are working fine. Any idea how to fix??