No, there is not a problem with my device. I play with headphones and this is big problem for me. Only the musics are mono. So the ambiance and other sounds are as they should be. I've heard that a few more of my friends have experienced this. It's definitely a bug if this wasn't done on purpose.It may be how your device plays audio, I recommend checking your system settings to see if audio is set to Mono or Stereo in case you have changed it recently