Music track duplicated when playing it back

REPRODUCIBILITY: 100%
OS VERSION: 4.6.0.13
HARDWARE: Xperia 10II
UI LANGUAGE: English
REGRESSION: yes

DESCRIPTION:

I have an app built on SFOS SDK - 4.6.0.11, this app performs as I expect under SFOS 4.6.0.13, which when playing a music track, all I hear is the one track, as it should be.

I built the same app on SFOS SDK - 4.6.0.13, this version does not perform as I expect, as I can hear the same track being played simultaneously. If I stop the track in my app, the track keeps playing, even when I close my app, the music keeps playing.

PRECONDITIONS:

Have an app that YOU BUILT, that has a mediaplayer as a primary or secondary function.

STEPS TO REPRODUCE:

  1. Play any track you like, you should only hear the one track playing
  2. Stop the track manually, but the same track plays on

EXPECTED RESULT:

Under 4.6.0.11 / 4.6.0.13 - the track to play without the same track being played simultaneously and when I stop playing, the music should also stop.

ACTUAL RESULT:

Under 4.6.0.13 - the same track you play is played simultaneously again, when you stop the track in your player, the track continues to play, even after closing your app.

MODIFICATIONS:

None, I gave up with patchmanager and editing system files, too much grief in the long run

ADDITIONAL INFORMATION:

IF someone is interested in trying both versions of my app, leave a comment and I will upload both to my dropbox, thanks.