The mouse cursor can move out of the window while unpaused

i reported this issue about 5 months ago and nothing. so im doing it again. When I am mining my mouse will move out of the window when I look up or down in the game, if I click my mouse, game doesnt always pause just opens what i click. Also it seems that this bug has been for lots of versions and no one actually cares to even bother trying to assist i can now understand how you guys lost so many people so quickly if this is how you treat people,