Liking songs on lock screan

[nt7]

I just upgraded to premium. For the past several days I have been listing to my daily mix, and liking songs with the heart on my lock screen. Over this time I "liked" a good deal of songs, only to find that the ones liked when the screen was locked are nowhere to be found.

If I like a song while the screen is locked it remains marked when unlocked. 

I have reinstalled the app and the problem has persisted. 

Any help would be greatly appreciated!