SnapToItem in ListView not correct

Please look a the screenshot I've attached. There are two ListViews with rectangles. For both ListViews snapMode is SnapToItem. On the left everything it's okay. But on the right I've set this position with the mouse. It's not correct because it has stopped in the middle of the rectangle. I've analyzed the behaviour a little bit. There is a small area in the rectangle where the snapMode not works. After or before that area the rectangle snaps correctly.