Text.QtRendering does not render some dingbat glyph

import QtQuick 2.0

Rectangle {
    id: root

    visible: true
    width: 1080
    height: 720

    FontLoader {
        id: myDingbatFont
        source: "./MyDingbat.ttf"
    }

    Column {
        id: view

        anchors.fill: parent

        Text {
            id: glyph
            font.pixelSize: 32
            font.family: myDingbatFont.name
            renderType: Text.QtRendering     // qmlscene: malloc.c:3996: _int_free: Assertion `nextchunk->fd_nextsize->bk_nextsize == nextchunk' failed.
            //renderType: Text.NativeRendering // Success
            text: "\ua500" + "\ua501" + "\ua502" + "\ua503" + "\ua504" + "\ua505"
        }
    }
}