Playback.dispose() Does Not Stop Playback in Cocoon for iOS

[Joncom]

var music:Playback = pack.getSound("music");
music.play();
music.dispose();

Expected behavior: Music should not play because dispose() was called immediately.

Environments where expected behavior occurs:

• Chrome 56.0.2924.87 (64-bit) on Mac
• Chrome 55.0.2883.91 on Android
• Safari 10.0.3 (12602.4.8) on Mac
• Safari on iOS 10.2
• Cocoon (aka CocoonJS) on Android

Environments where expected behavior does NOT occur:

• Cocoon (aka CocoonJS) on iOS 10.2

In Cocoon on iOS, the above code results in the entire audio playing through. However, if you were to call dispose a few moments later instead, it would properly halt the audio.