Material style ToolButton's ripple/hover effect breaks when text is cleared on click

import QtQuick 2.6
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.1

ApplicationWindow {
    visible: true
    width: 400
    height: 280

    Column {
        anchors.centerIn: parent

        ToolButton {
            text: "Ctrl+M"

            onClicked: text = ""
        }
    }
}