Background: Completely stock Nexus 4 - 4.4.3
Completely stock Nexus 7 - 4.4.2
No task or app killers
Problem: Out of no where when swiping away any music player (Google Play Music, Shuttle+, Wiizm etc) the music is killed!? The phone seems to be preventing the app from running in the background. I can hit the menu hot key and open other apps and music will play fine, it just won't continue playback if app is swiped.
I've also noticed I no longer get any form of mini player in the notification pull down or notification (headphones, play symbol etc) in the status bar if I have music playing unless I swipe the app but by which time the music has been killed!
What I've tried: Numerous searches, factory reset, uninstalling and reinstalling apps, cache and data clearing and even a different user account.
I could completely understand that something could corrupt or I could possibly hit a setting I've never seen before causing this to happen but surely a factory reset would resolve it? To add insult to injury my Nexus 7 has gone exactly the same way with the same symptoms. I don't even have the same music players on the individual device so I can't blame it on one particular app.
It driving me insane! Does anyone have any suggestions?