Crash when closing a WKWebView backed WebView

import QtQuick 2.0
import QtWebView 1.1
import QtQuick.Window 2.12
Window {
    WebView {
        anchors.fill:parent
        url: "https://google.com"
    }
    Component.onCompleted: {
        window.show();
    }
}

    auto e = new QQmlApplicationEngine(qobject_cast<QObject*>(this));
    disconnect(e, &QQmlApplicationEngine::quit, nullptr, nullptr);
    e->load(source);
    connect(e, &QQmlApplicationEngine::quit, &QQmlApplicationEngine::deleteLater);