Whenever I Play Music to a AUX Cable, sound keeps reducing & going back to Normal?

[WPCentral Question]

So, whenever i play music on my 950 xl on speakers/ music Systems/ Car System/ Nokia Speakers, the sound keeps reducing and increasing, also lagging the music and muting suddenly. It works fine on headphones. When i played the radio on the phone while it was connected to the system it worked fine. Also, when i added a memory card, the music started playing normally everywhere.
Anyone know about this?
The software i use to play music is Groove Music

 

[TheChazas]

Read that some people experienced the same thing with Speaker volume.