If I have my mac desktop app open to the Liked Songs list and I use my iPhone to like a song in the app, the desktop app will sync and update the new liked song to the list. But, if I quit the desktop app and then use my iPhone to like one or multiple new songs, and then reopen the desktop app and go to Liked Songs, not even one new liked song will show up. Even if I log out of the desktop app and sign back in, it still doesn't update the newly liked songs. I would have to uninstall/reinstall the app, delete the cache folder and application support folder every time I want the app to be updated with the correct Liked Songs. And as for the browser web player, I have no issues at all and it syncs perfectly with my iPhone app when making changes. It's only the desktop app I'm having issues with.