ListView.onAdd and onRemove attached signals are not emitted for Menu delegates

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Templates 2.15 as T
import org.kde.kirigami 2.20 as Kirigami

T.Menu {
    id: control

    Kirigami.SizeGroup {
        id: sizeGroup
        mode: Kirigami.SizeGroup.Width
    }
    delegate: MenuItem {
        ListView.onAdd: {
            sizeGroup.items.append(this)
        }
        ListView.onRemove: {
            sizeGroup.items.remove(this)
        }
    }

    contentItem: ListView {
        model: control.contentModel
    }
}