Some local file track titles not being displayed

[dannygl]

I have a few local file-based tracks whose titles are not being displayed in Spotify, either in the Desktop version on Windows 10 or the iOS version on an iPhone 6s. I verified that the metadata inside the MP3 files is correct, and Spotify can play the tracks properly. What's especially strange is that the tracks display in the sort order according to their titles, so Spotify is using the titles to sort the tracks properly, it's just not showing those titles.

If you look at the below image, you'll see two examples of this. There's a track with a blank title between Another Saturday Night and Chain Gang. The track is Bring it on Home to Me. Then there's a track with no title between Shake and Soothe Me. It's called Somebody Have Mercy.

Any ideas what the cause of this problem is, and how to fix it? Thanks.