Segmentation fault when trying to change foreground at QTableWidgetItem from a slot

Question

I have an error when i try to dynamically create a table and it's items. And based on a state of QComboBox item I'm changing the background colour of Qt:DisplayRole item. The number of rows is random and could vary. Error occurs only after particular index of a row. Like when there is a 15 rows, it could or couldn't crash at 5th, 6th or maybe 14th row. It is always a random number and i can't understand why. And i understand that error could be related to a wrongly pointed index of an item. But when i was debugging my app qDebug() indexes were always correct

Here is a slightly simplified example of my code:

QList<QTableWidget *> tableList; //Global variable;
QList<QComboBox *> comboBoxList; //Global variable;

int rowCount = 5;
int columnCount = 2;

tableList.append(new QTableWidget());
tableList.last()->setRowCount(rowCount);
tableList.last()->setColumnCount(columnCount);


for (int row = 0; row < tableList.last()->rowCount(); row++) 
{
    tableList.last()->setItem(row, 0, new QTableWidgetItem());
// This is the problematic item that causes segmentation fault \/
    tableList.last()->item(row, 0)->setData(Qt::DisplayRole, QVariant(1));

    QComboBox *tmpComboBox = new QComboBox();
// My stupid temporary workaround with row indexes that also could cause troubles, but overall it works
    tmpComboBox->setObjectName(QString::number(row));
    
    comboBoxList.append(tmpComboBox);
    comboBoxList.last()->addItem("on", "on");
    comboBoxList.last()->addItem("off", "off"); 
    tableList.last()->setItem(row, 1, comboBoxList.last())

    connect(comboBoxList->last(), SIGNAL(currentIndexChanged(int)), this, SLOT(onStateChanged(int)));

}

// Slot realisation
void Widget::onStateChanged(int stateIndex) 
{
   const int on = 0;
   const int off = 1;
// My stupid temporary workaround with row indexies that also could cause troubles, but overall it works
   int currentRow = sender()->objectName().toInt();

   if(stateIndex == off) 
   {
     //This is the place of crash
     tableList.at(someIndexOfExistingTable)->item(currentRow, 0)->setForeground(Qt::Gray)
   }
   else 
   {
     //Also the place
     tableList.at(someIndexOfExistingTable)->item(currentRow, 0)->setForeground(Qt::Black)
   }
}

I tried to catch an error and it only occurs on the last section of setForeground(). I expceted it to work with all items of the table. But it works only with a few of them. This error also repeats itself when i try to change QFlags of an item. I also tried to manually point an existing index of item but app also crashed with SEGMENTATION FAULT. ChatGPT didn't helped me either :)