I've tried running the Scene Graph - Custom Rendering with QSGRenderNode sample on Fedora 37 and Gnome 43. The sample runs fine, but if

    qputenv("QT_QPA_PLATFORM", "wayland"); 

is used to force the application run under wayland, there is a crash happening when the application windows is closed. Running the debugger points to line 568 in qwaylandwindow.cpp in this code:

void QWaylandWindow::damage(const QRect &rect)
{
    mSurface->damage(rect.x(), rect.y(), rect.width(), rect.height()); // line 568
} 

I didn't verify the issue under Qt6 as it is only available to run with Qt 5.