android 4.2 lockscreen controls

Lock screen controls...one of my favorite features! i seem to be having a problem with it though. ..

Live pro 3.01

nexus 4 with stock 4.2

Scenario:

Playing xiia live and go to lock screen it works fine. 

Stop xiia and  do some other tasks, and start xiiia to play again, go to lock screen...controls are gone. 

now i have a feeling this might be a result of playing google music (the streaming app) in between. It seems like android might lose focus of the lock screen control from competing with the google music lock screen controls.  

the only way to get the lock screen controls to return is by rebooting the phone. 

I m sure this is an android os issue but i figured i would put it out there for possible repair