Music files that won’t show up in playlists in LMS

Hi everyone. Can anyone offer help/ suggestions for downloaded music files that won’t show up on a playlist in LMS? By that I mean the files seem to play alright, but the titles don’t show up on the playlist. They seem to be ‘hidden’ in the playlist between other tracks/titles.

I have a handful albums downloaded that behave like this and I’m trying to correct them. I’m using LMS 8.0.0 but I’ve seen occasional files like this using any version in the past.

Is this a common problem or easy fix? Can I fix these with a program like mp3tag? I’ve tried removing all of the tags and then adding them all again but no luck.