Songs aren’t playing from my playlist, but are from the artist’s page.

Hi, I'm having an issue with P1Harmony songs on Apple Music. I can play the songs from the artist page and search results, but they become greyed out and won't play when they're in my playlists. This happens on both my iPhone and music.apple.com. After refreshing Sync Library, most of my P1Harmony songs disappeared from my playlists, and now Apple Music says songs have been added without actually displaying them. I've tried creating a new playlist, but the problem continues. Could you help me restore my playlists and fix the affected tracks?