This weird thing happened this morning (and still goes on). My phone is on vibrate while listening to music but everytime I get a text, the notification sound will still play. This of course interrupts the music and is pretty damn annoying. I tried setting the phone to silent but it's still the same. If I unplug the headphones the phone acts as it should on the different settings. I listen to music everyday and it hasn't been a problem before. I use Spotify as my only music source but the problem is the same if I watch movies with the stock app. I hope someone will be able to help me.