Default Music plays through phones built in earpiece rather than the speaker?

Hi all,

I have recently noticed the issue above, really odd but the music, any videos etc play their audio through the phones earpiece at the top, rather than the speaker.

The phone is running paranoid android and it used to work perfectly fine. Just recently I noticed this is happening though.

It was like this earlier while I was using TuneIn to listen to the radio, I received a whatsapp message and that somehow triggered it to switch to the main speaker like it should, although the phone was on vibrate

Anyone have any ideas on this please?