When I'm listenning to music, the volume gets softer and then louder randomly. At first I thought it was just the ebb and flow of the music, but it's become more noticable. It's also not a hardware issue as this happens when I use headphones or bluetooth speakers. I have already tried turning off music normalization but the issue still occurs.
I have a Samsung s6 active and am on spotify version 184.108.40.2068.