QML Slider not correct coercing of it's value and position properties

import QtQuick 2.7
import QtQuick.Controls 2.0 // or 2.1
import QtQuick.Window 2.0

Window{
	visible: true
	width: 200
	height: 40

	Slider {
		id: slider
		from: 0
		to: 10
		stepSize: 1
		snapMode: Slider.SnapAlways
	}
	Label {
		text: slider.value + " :: " + slider.position
	}
}