If you have the game windowed, the dialogue area remains the same along the entire monitor regardless where you put the windowed game or how small you make it. The game will act as though it is still in full screen and proceed with dialogue even if the focus isn't on the game and/or click outside of the window along the bottom half of the screen. This bug is not excluded from activity on a multiple monitors. So clicking on my second monitor where the dialogue area would usually be will continue the dialogue even when the small window of the game is on the upper-half of my primary monitor.