Audio just stops topic

I've had my Tab Pro 8.4 for a few weeks and playing audio with the screen off has been no problem until now. After about 1 minute after turning the screen off the music pauses for no reason I can discern. I've tried with Poweamp, my usual music player, and stock music players and all do the same thing (I think stock players automatically pause when the screen is off) . It started happening after installing Wanam Exposed and the Xposed framework. I have since uninstalled both of them but the problem remains. Anyone able to help? Thanks.

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