Media button double click most of the time doesn't work when screen is locked

[tripolar]

normally when i press the button on my headset the vanilla player pauses the song. when i press it two times the player switches to next song. When i lock the screen and press the button one time the song pauses. But when i press it two times, the player nearly never switches to next song. About 1 time out of 10. I think it's not a lockscreen problem as the double click works for other players as expected when the screen is locked

[tripolar]

okay pressing the button three times switches to the next song. really nice player :).
can be closed.