iPad pro music bug

HI!

I recently bought an iPad Pro and the first issue I got stuck with is that of a Music program. In the left bottom corner there is a button named "My Music" which works normally until I play any song. A bunch of buttons appear above My Music and whenever I try to tap on it the song stops of another one s1tarts playing, like the region controlled by play buttons expanded downwards. I am really confused, because Music app on Pro is really laggy.

Has anyone experienced something like this and/or know the solution?