Volume decreases when playing audio with headphones

[Android Central Question]

Hi

I recently purchased a brand new One Plus 5.

The phone works fine apart from when I listen to music with my headphones plugged in. For the first 10-15 minutes there is no problem at all. Then what starts to happen is the volume starts to decrease automatically right down to zero. I can actually see this happening on the screen as it is decreasing. Even though I try to turn it up it is battling with me & wants to turn the volume down. I don't tend to get this problem with the headphones I got with the phone but it seems to happen with some decent headphones I prefer to use.

Does anyone have any ideas how to fix this?

 

[newcollector]

What music player app are you using? Have you tried downloading and using another to see if the same thing happens?