QWheelEvent passed to QQuickItem::wheelEvent() has 0 delta since 5.12

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QDebug>
#include <QQuickItem>

class MyItem : public QQuickItem
{
    Q_OBJECT

public:
    MyItem() {}

    void wheelEvent(QWheelEvent *event) override {
        qDebug() << event->angleDelta() << event->delta() << event->pixelDelta();
    }
};

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

    qmlRegisterType<MyItem>("App", 1, 0, "MyItem");

    QQmlApplicationEngine engine;
    engine.load(QUrl("qrc:/main.qml"));

    return app.exec();
}

#include "main.moc"

import QtQuick 2.10
import QtQuick.Window 2.10
import QtQuick.Controls 2.3

import App 1.0

Window {
    id: window
    width: 400
    height: 440
    visible: true

    MyItem {
        anchors.fill: parent
    }
}