So I am making a game and have been on this one for about a week now. And just now am dealing with this issue. I know how to make a mouse appear and disappear as I wish it to on the game engine. However, just recently, I press P to play the game to test it out and the mouse is on the screen.
Even if I look through cameras or not, it is showing. So here is what I already did to try to fix this issue. I made sure no scenes were overlaying with the mouse visible. I made all cameras that will be used have and invisible mouse. I even googled as much as I could possibly find and only found that on the right panel, under render it can have the mouse active... And it wasn't.
Also, when I am playing the game, not only is the mouse in the middle of the screen but as I rotate the camera around with the mouse. The Screen mouse gets huge. Which can cause a huge issue if you are playing a game.