Music starts playing on loudspeaker when I hang up the phone

[heading4tomorrow]

I hate this and it happens everytime.
If I pause something (or sometimes when tune in is running in the background, but stopped) hanging up causes it to just start playing again. Really annoying.
I never use stock music player or any other Mp3 player so I only experience this with tune in.
Does the stupid OS think it paused the music when I took the call and then just hits play automatically assuming it paused it in the first place? S