QXmlSimpleReader truncates character references of non-BMP characters

tmp = ref().toUInt(&ok, 16);
stringAddC(QChar(tmp));

#include <QDebug>
#include <QDomDocument>
#include <QXmlSimpleReader>
#include <QXmlStreamReader>

int main(int argc, char *argv[])
{
    QString xml = QStringLiteral(u"<test>&#x1F469;</test>");
    QDomDocument doc;
    QString errorMsg;
#if 1
    QXmlSimpleReader reader;
    reader.setFeature("http://qt-project.org/xml/features/report-whitespace-only-CharData", true);
    reader.setFeature("http://xml.org/sax/features/namespaces", false);
    reader.setFeature("http://xml.org/sax/features/namespace-prefixes", true);
    QXmlInputSource source;
    source.setData(xml);
    doc.setContent(&source, &reader, &errorMsg);
#else
    QXmlStreamReader streamReader(xml);
    doc.setContent(&streamReader, false, &errorMsg);
#endif
    qDebug() << errorMsg;
    qDebug().quote() << doc.documentElement().text();
}

""
"\uF469"

""
"👩"