Application built with Quick Compiler crashes

To reproduce:
1) Create new Quick application with this code:

import QtQuick
import QtQuick.Window 

Window
{
    Item
    {
        id: item 

        width: 0 + 10 

        onWidthChanged:
        {
            console.log("START")
            var parentItem = item.parent;
            var rootDialog = item;
            while(parentItem)
            {
                rootDialog = parentItem;
                parentItem = parentItem.parent
            }

            console.log("END")
        }
    }
}

2) Set compiler to MSVC2019
3) Enable Quick Compiler
4) Set build mode to "Debug"
Build and run the application -> crash in the while loop

error: this pointer is nullptr:
Qt6Quickd.dll!QQuickItemPrivate::q_func() Line 224 C++
Qt6Quickd.dll!QQuickItemPrivate::data() Line 3656 C++
Qt6Quickd.dll!QQuickItem::qt_static_metacall(QObject * _o, QMetaObject::Call _c, int _id, void * * _a) Line 1650 C++
Qt6Qmld.dll!QQmlPrivate::AOTCompiledContext::getValueLookup(unsigned int index, void * value, void * target) Line 1691 C++

5) Comment the code in onWidthChanged
Build and run the application -> no crash
6) Close the application
-> crash

Works without crashes in Qt 6.4