Problems with playing music on Samsung phones

[MikeDvorakCZ]

Hello,

I have problem with playing music on my Samsung Galaxy S6. I have premium version.

So the problem is that I plug my headphones start playin music, my playlist  automatically and shuffled. Then I shut down phone. For a while it plays and then I move with phone and song pauses or switches to another song and gets stuck.When I tryied play it without headphones, it played normal, without problem. I tryed my spotify too on friend's S7 edge. The same thing. I think that it is like some function or sensor on these phones. So this thing does that I cant listen music.... 

Do you know, where is the problem? What is wrong setup? 

Thank you for answer.