QTableView: Edit without editing ability

I have QTableView with QAbstractTableModel. Each second I download XML data from server and parse it and merge into QAbstractTableModel data. I have one column which can be edited by doubleclick - it is named "callsign".

When user wants to add new row into table he open modal dialog, fill fields and submit it.

My problem is following. After add dialog is closed I doblueclicking on "callsign" column. Edit control opens in cell but I can not enter any data in it! There is a sense that focus is missed on table. Is is missed in other form controls too. I push TAB but nothing happens.

Have anybody this problem?

This is code of my model:

Code:

---

QVariant TxOrderModel::data(const QModelIndex &index, int role) const
{
    if (role == Qt::DisplayRole) {
        return m_TableData.getCellValue(index.row(), index.column());
    }
    if (role == Qt::EditRole) {
        return m_TableData.getCellValue(index.row(), index.column());
    }
    if (role == Qt::BackgroundColorRole) {
        return TxOrder::getStatusColor(m_TableData.getCellValue(index.row(), QString("order_status")).toInt());
    }
    return QVariant();
}
 
Qt::ItemFlags TxOrderModel::flags(const QModelIndex &index) const
{
    Qt::ItemFlags flags = QAbstractTableModel::flags(index);
    QString columnName = m_TableData.getColumnName(index.column());
 
    if (columnName == "driver_callsign") {
        flags |= Qt::ItemIsEditable;
    }
 
    return flags;
}
 
bool TxOrderModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
    if (role == Qt::EditRole) {
        QString columnName = m_TableData.getColumnName(index.column());
 
        if (columnName == "driver_callsign") {
            QString primaryKey = m_TableData.getRowFieldValue(index.row(), m_TableData.getKeyField());
            QString callsign = value.toString();
            if (!callsign.isEmpty()) {
                m_Order.setDriverToOrderByCallsign(primaryKey, callsign);
                emit dataChanged(index, index);
            }
        }
    }
    return true;
}

---

And this is how I open add dialog box:

Code:

---

void MainWindow::buttonEditOrderClick()
{
    DialogOrderEdit dialog;
    dialog.exec();
}

---

Dialog modal property is set to true.

---

Added after 24 minutes:

I have disabled all updates of data in table and comment code in model setData(). I found the way to reproduce this error:
1. Open window with QTableView.
2. Open modal dialog.
3. Close dialog.
4. Fast doubleclick to edit cell while dialog are closing.