TextArea is showing scrollbars when initially empty and using autoSize

If the TextArea is using autoSize=true and has no text in it, the vertical scrollbar shows on start. If you edit to multiple lines, then remove the text, the scrollbar no longer shows.

Test Case:

import QtQuick 2.3
import Ubuntu.Components 1.2

Item {
        width: units.gu(20)
        height: units.gu(20)
        TextArea {
                autoSize: true
                anchors {
                        left: parent.left
                        right: parent.right
                }
        }
}