I use to be able to listen to a song, or pre-load a song, and when out of service (eg underground on subway) I'd still be able to listen to all the songs I've recently played. Now when listening to a song I've played 100 times, it cuts out the second I lose service. Has something changes with in the app? Is my phone just running low on memory and unable to cache songs? I know I can make certain songs availalbe offline, but I prefer this caching method.