When listening to a song from Discover Weekly, clicking the heart button in the "ongoing" notification player does not save the song to your library.
I started using discover weekly recently and I remember marking a song as favourite / liked (heart button). Days later I could not find that song when I really wanted to find it. I searched in my library and googled around a bit. It is stated that when you like a song / mark it as favourite, it automatically saves the song to your library.
That is true if you like the song directly in the app, but I noticed that when the app is in the background and you use the notification player to "like" the song, it does not save it to your library. (It only marks the song as liked and that is all).
Please fix it in the next release.