Cannot enter text in any of text inputs if they are nested in Page QML typ

import QtQuick
import QtQuick.Window
import QtQuick.Controls
import QtVncServerWindow {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")
    VncItem {
        anchors.fill: parent
    }
    Page {
    TextField {
        id: first
        focus: true
        placeholderText: "First Name"    }
    TextField {
        anchors.top: first.bottom
        focus: true
        placeholderText: "Last Name"    }
}
}