qt_add_qml_module does not register QML_SINGLETON classes if version starts with 0

class MyType : public QObject
{
    Q_OBJECT
    QML_ELEMENT

public:
    explicit MyType(QObject *parent = nullptr) : QObject(parent) {}
    Q_INVOKABLE QString name() const { return u"Foo"_qs; }
};

class MySingleton : public QObject
{
    Q_OBJECT
    QML_ELEMENT
    QML_SINGLETON

public:
    explicit MySingleton(QObject *parent = nullptr) : QObject(parent) {}
    Q_INVOKABLE QString name() const { return u"Bar"_qs; }
};

import QtQuick
import Version0

Window {
    width: 640
    height: 480
    visible: true

    MyType { id: cppObj }

    Component.onCompleted: {
        console.log(cppObj.name())
        console.log(MySingleton.name())
    }
}