Scrrenshots don't really help si hopefully I can explain. After starting the Imperium campaign, (Spire being attacked by the talkative chaos captain) the mouse refused to make a selection box (holding down LMB and dragging). Mouse wouldn't select target that I was clicking on unless I double clicked LMB. Nothing would work normally unless I double clicked basically. Selecting my own ships both through HUD and the actual ship, even had to double RMB to attack/target anything. In the prologue there was no issue like this although the mouse would be a little..stiff? I guess you would say. intended or not it felt really cumbersome and clunky.