Buttons remain some color of pressed-state

import QtQuick 2.7
import QtQuick.Controls 2.1
import QtQuick.Layouts 1.3
import QtQuick.Controls.Material 2.1

ApplicationWindow {
    id: window
    width: 640
    height: 480
    visible: true

    Page {
        anchors.fill: parent

        Label {
            text: "Drawer test"
        }
        Drawer {
            id: drawer
            z: 1
            leftPadding: 0
            width: parent.width / 3
            height: parent.height
            Flickable {
                contentHeight: myButtons.height
                anchors.fill: parent
                clip: true
                ColumnLayout {
                    id: myButtons
                    focus: false
                    anchors.left: parent.left
                    anchors.right: parent.right
                    spacing: 0
                    Repeater {
                        id: myRepeater
                        model: 16
                        // using the ItemDelegate without a Loader all works well
                        Loader {
                            Layout.fillWidth: true
                            sourceComponent: myComponent
                            active: true
                        }
                    } // repeater
                } // col lay

            } // flick

            Component {
                id: myComponent
                // you can also use ToolButton to get a round area remaining pressed-state
                ItemDelegate {
                    Layout.fillWidth: true
                    Layout.alignment: Qt.AlignHCenter
                    focusPolicy: Qt.NoFocus
                    height: 48
                    width: drawer.width
                    leftPadding: 16
                    Row {
                        Item {
                            height: 24
                            width: 24
                            Label {
                                height: 24
                                width: 24
                                verticalAlignment: Image.AlignTop
                                anchors.horizontalCenter: parent.horizontalCenter
                                text: "my Item"
                                font.pixelSize: 24
                            }
                        }
                    }
                    onClicked: drawer.close()
                } // toolbutton
            } // myComponent

        } // drawer

    } // page
}