QtQuickControls2 BusyIndicator not showing with fusion style

import QtQuick 2.10
import QtQuick.Window 2.10
import QtQuick.Controls 2.2

Window {
  visible: true
  width: 640
  height: 480
  title: qsTr("Please use FUSION style")

  MouseArea {
    id: mouse
    anchors.fill: parent
  }

  BusyIndicator {
    anchors.centerIn: parent
    running: mouse.pressed
  }
}