Hi, I've had my surface book for just over a week now and I have noticed a somewhat minor yet worrying issue. Sometimes when the screen is attached to the keyboard the whole screen goes black for a half second then comes back on. When it comes back on it makes the little chime that indicates it's attached leading me to believe it's somehow automatically detaching and re-attaching itself. Has anyone had an issue like this because I've searched the Internet and can't find anything? Thanks.