[Android] The footer reappears on the screen each time the user focus on the text area

import QtQuick
import QtQuick.Window
import QtQuick.ControlsApplicationWindow {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")    Flickable {
        id: flickable
        flickableDirection: Flickable.VerticalFlick
        anchors.fill: parent        TextArea.flickable: TextArea {
            id: textArea
            textFormat: Qt.RichText
            wrapMode: TextArea.Wrap
            focus: true
            selectByMouse: true
            persistentSelection: true
        }        ScrollBar.vertical: ScrollBar {}
    }
    footer: ToolBar {    }
}