Dynamic FontLoader instantiation causes crash in some cases

import QtQuick 2.12
import QtQuick.Controls 2.12

ApplicationWindow {
    width: 800
    height: 600

    visible: true

    Component {
        id: labelComponent

        Label {
            FontLoader {
                id: fontLoader
                source: 'qrc:/awesome.otf'
            }

            font.family: fontLoader.name
            text: '\uf06e'
        }
    }

    Button {
        x: 200
        visible: loader.status === Loader.Ready

        text: 'Unload'
        onClicked: loader.sourceComponent = null
    }

    Button {
        visible: loader.status !== Loader.Ready
        topPadding: pressed ? 0 : -2
        font.weight: Font.Bold

        contentItem: Label {
            text: 'Load'
            horizontalAlignment: Qt.AlignHCenter
            verticalAlignment: Qt.AlignVCenter
        }

        onClicked: loader.sourceComponent = labelComponent
    }

    Loader {
        id: loader
        anchors.fill: parent
    }
}