If a Lua error window pops up and is not closed, if you touch some other part of the screen and it drops below the HUD, where it can't be interacted with, all of the games controls lockup. Only the home key works to drop you back to the home screen. VO then has to be force stopped.

If other windows are opened (eg. the console) and it drops below the HUD, you can still press the back key to bring up options which brings it back to the fore where you can close it. This is not happening with a Lua error window.