Alt-tabbing during dialogue and choices can cause a varying list of issues. The following issues I have noticed due to alt-tabbing: Alt-tabbing after dialogue has changed will make the box flicker for a frame or two with past text, of unknown pattern. If alt-tabbed twice in the same dialogue box, the issue will not happen. Alt-tabbing during choices can sometimes force the game to choose the last selection automatically. Alt-tabbing shortly after these choices can actually cause the paths to switch entirely. An occasion I can specifically recall of this is, in Mercy's path, choosing the top-most wine (the name fails me at the moment), alt-tabbing in the middle of dialogue, and the dialogue instantly changes to something else, along with the reaction/expression of Mercy. Those are the issues I can currently recall with alt-tabbing, though I will be sure to report back with any patterns or new discoveries related to this. EDIT: For clarification, these issues happen on both fullscreen and windowed mode.