How do I enable the Android lock screen in developer mode?

Hi all,

I have a bug where my app crashes if the user gets to a certain screen in my app then locks and unlocks their android device. I think it's something to do with the webcam as I'm displaying the device's camera on that screen. Anyway, I built a development version of my app to debug this and found that, when in developer mode the lock screen is disabled.

http://forum.unity3d.com/threads/game-is-preventing-the-lock-screen-from-appearing.205632/

Obviously this is useless for me. Does anyone know a way around it?

Thanks in advance,

Guy