Bug on DragHandler with mouse buttons

// main.cpp
#include <QGuiApplication>
#include <QQmlApplicationEngine>

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

    QGuiApplication app(argc, argv);

    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();
}

// main.qml
import QtQuick 2.12
import QtQuick.Window 2.12

Window
{
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    Rectangle
    {
        id : dragable

        x: 100
        y: 100
        width: 200
        height: 200
        color: "blue"

        DragHandler
        {
            id: dragHandlerID
            acceptedButtons: Qt.RightButton
            onActiveChanged:
            {
                console.log("Drag is activated");
            }
        }
    }
}