Copied from a discord report:

Not sure if this is a bug or I should leave it in feedback, but I constantly window (remove focus from) the game whenever action happens on the left side of the screen becasue as I aim my pointer drifts and then I click to shoot and have to swap over. Adjusting the 2nd monitor to a diagonal helped but now when it happens I can't unwindow it as fast and the game is unpaused.