This morning my wake up alarm failed to sound at all. I have it set to a station on IHeart Radio, have for years. Also my entire system is gen 1. 

I think it’s because I was listening to a YouTube playlist the previous day, I had paused play via my android and then forgot about it. When I awoke 30 minutes late (!), I grabbed my phone and saw that the playlist from yesterday was still displayed. 

I need my alarms to go off reliably, every time! Is there a setting or quick fix so this never happens again?

Many thanks.