I've been having a similar problem as well. I will thumbs up multiple songs, however they never appear anywhere. My thumbs up list has remained at 67 for months now, and I can't remove any of the songs. I've tried deleting the app, signing out of my account, clearing the data on the app, going through settings to see if it was something I did, nothing. I use that to add songs to my playlists later when I have time but I can no longer do that since it won't add or remove any songs from it.
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