Import with qualifier breaks enums for ListElement

#ifndef ENUMTESTER_H
#define ENUMTESTER_H
#include <QObject>

class EnumTester : public QObject
{
    Q_OBJECT
public:
    enum Types
    {
        FIRST = 0,
        SECOND,
        THIRD
    };
    Q_ENUM(Types)
};
#endif // ENUMTESTER_H

import QtQuick 2.12

import bug.test 1.0 as BACKEND
//import bug.test 1.0

Item {
    ListModel {
        ListElement{ text: qsTr("First"); type: BACKEND.EnumTester.FIRST }
//        ListElement{ text: qsTr("First"); type: EnumTester.FIRST }
    }
}

#include "EnumTester.h"
#include <QGuiApplication>
#include <QQmlApplicationEngine>

int main(int argc, char *argv[])
{
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

    QGuiApplication app(argc, argv);

    qmlRegisterUncreatableType<EnumTester>("bug.test", 1, 0, "EnumTester", "Object only creatable in C++");

    QQmlApplicationEngine engine;
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
        &app, [url](QObject *obj, const QUrl &objUrl) {
            if (!obj && url == objUrl)
                QCoreApplication::exit(-1);
        }, Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}