Summary:
Crash on lobby 'Exit Game' from full screen - Fatal-ISV GFX D3DDevice
Description:
If I have the game in full screen mode, ALT-TAB out and then decide to close the game using the 'Exit Game' button in the lobby, the following error appears in a few seconds. No such error appears if I hit 'Exit Game' while in browser mode.

Reproduceability:
Always
Version:
IAv5067 Lv6695
Other:
End of console log...
_____ ggc log _____ [NOTIFY] SessionBlurred
_____ ggc log _____ [liFECYCLE] Game::blurSession();
_____ ggc log _____ [NOTIFY] SessionKilled
_____ ggc log _____ [liFECYCLE] Game::hostEnd();
_____ ggc log _____ [InvalidNotification] SessionFullscreen
_____ ggc log _____ [NOTIFY] SessionFullscreen,0,0
GFXPCD3D9Device::reset - depthstencil 1b8b7160 has 3 ref's
--- Resetting D3D Device ---
Update:
Same applies when (not Alt-tabing) when going back to lobby via full screen mode and hitting end game while its process was still in full screen mode.