Album is split on iOS, but intact on MacOS Music

I have 2 albums (CD-rips) that are fine on MacOS Music on my MacBook, but after I sync them onto my iPhone, each has a track or two that gets split into a separate album with the same name. **Again, the albums are *not* split in MacOS Music.** They only get split on iOS. Strangely, the split only happens on the *second* sync. The sync which adds the album will result in the album being intact. But on the *next* sync, the album will suddenly get split on iOS (and *only* iOS). Before you hit me with the usual solutions, please know that I tried all of the following: * I have checked and triple-checked the metadata. It's correct. The only fields that differ are "Artist" and "Track Number". * I have unchecked the "compilation" checkbox and then rechecked it and then re-synced * I have deleted the tracks from MacOS Music and re-imported them and then re-synced Here's what the album looks like in MacOS Music and then in iOS after 2 syncs: Is there any way to stop this iOS split from happening?