Music Player Problem

[Voidbladestorm]

So Ill be using either my CorePlayer v1.3.6 Build-7427 or Ill be using Pocket.Player.v4.1
Ill be listening to my music play fine and with out pressing any buttons change the screen and proceed to call the last person that i talked to on my recent calls list. JUST RANDOMLY
And to further piss me off more. None of the sound will work after that incident like ill press the deny button on the phone and go back to the program and itll be playing the song but no sound will come out of the speakers.

Its been happening for a while now and it makes me have to Soft reset my phone so itll have sound again. I dunno wtf its doing. Any advice or similar issues?