VerticalHeaderView/TableView required properties go all over the place when using syncView

[romain.donze]

I have recently switched from Qt 5.15 to Qt 6.5 and doing so, I had to use the Quick.Controls 2 TableView.

When trying to do this kind of thing:

TableView {
    id: tableView
    anchors.fill: parent

    leftMargin: checkColumn.width
    clip: true

    model: TableModel {
        TableModelColumn { display: "name" }
        rows: [ { "name": "Harry" }, { "name": "Hedwig" } , ...]
    }

    selectionModel: ItemSelectionModel {
        model: tableView.model
    }

    delegate: Rectangle {
        implicitWidth: 100
        implicitHeight: 30
        color: selected ? "blue" : "lightgray"

        required property bool selected

        Text { text: display }
    }
}

VerticalHeaderView {
    id: checkColumn
    parent: tableView
    syncView: tableView
    selectionModel: tableView.selectionModel
    boundsBehavior: tableView.boundsBehavior
    delegate: CheckBox {
        required property int row
        required property bool selected

        onRowChanged: console.log("onRowChanged", row, selected)
        onSelectedChanged: console.log("onSelectedChanged", row, selected)
        checked: selected
        onToggled: tableView.selectionModel.select(tableView.model.index(row, 0), ItemSelectionModel.Toggle | ItemSelectionModel.Rows)
    }
}

I realised that the "required property int row" in the checkbox is reupdated on every item loaded in the header as soon as 1 item is flicked outside the view, and required property bool selected changes to false without even emiting any signals (I can see it through the checkbox that is unselected) though there is selected indexes in the ItemSelectionModel. But this does not appens int the main TableView.

I have already create a BUG for this (https://bugreports.qt.io/browse/QTBUG-115227)