Similar situation: I’m also using the Vive and the cursor is offset to the right of the actual position in simulation mode. For example, in the level view, when the mouse is over “Launch” then “Build” is highlighted. The cursor is offset everywhere in the UE4 window but is fine on the rest of the desktop. The offset makes debugging AI or blueprints quite difficult. The project is presently using 4.11, it worked fine in 4.10.