Force draw on OnApplicationPause on Android possibly iOS

[breakmachine]

I'm working on a time-based word-game and when a user clicks the "switch-app-button" on Android he gets a thumbnail of the game making it very easy to cheat. I've tried activating a panel on top of the game on "OnApplicationPause" and even calling Refresh() on that panel but it seems it doesn't manage to draw it before Android makes a thumbnail. Has anyone got any ideas on how to solve this?

Currently using NGUI 3.0.7f1

[breakmachine]

Tried doing anything with the camera in OnApplicationPause including Render() but still don't work so I've emailed Unity support.