Kinda odd Cursor Lock Stuff

So I was wondering if anyone else has had problems with Cursor Lock? I have never had an issue before and for some reason now I have to

Code (CSharp):

1. Cursor.lockState = CursorLockMode.None;

before I can

Code (CSharp):

1. Cursor.lockState = CursorLockMode.Locked;

otherwise the mouse appears in the center of the screen with a weird flickering effect. None of my other projects though have done this. And it only does this in the build, not in the editor. Am I missing something? 90% of the time it's something stupid and simple for me.