QTextDocument layout problem with text disappears

Hi,
I am making a text editor using QGraphicTextItem and QTextDocument clases and I have a problem with text that disappears.

I have inserted my custom item at the begining of the block:

I use my CharFormat for the item:

Code:

...
    QTextCharFormat format = cursor->charFormat();
 
    cursor->movePosition(QTextCursor::StartOfBlock);
    MyItemFormat myItemFormat(format, listId(), level);
    cursor->insertText(QString(QChar::ObjectReplacementCharacter), myItemFormat);
...

Then I have registered handler class:

Code:

MyHandler* mh = new MyHandler(this);
 
document()->documentLayout()->registerHandler( MyItemFormat::Type, mh);

I have reimplemented intristicSize and drawObject methods:

Code:

QSizeF MyHandler::intrinsicSize(QTextDocument * doc, int posInDocument,
                                            const QTextFormat &format)
{
...
return QSizeF(30, 30);
}

and a draw

Code:

void MyHandler::drawObject(QPainter *painter, const QRectF &rect,
                                       QTextDocument * doc, int posInDocument,
                                       const QTextFormat &format)
{
....
    QTextCharFormat charFormat = format.toCharFormat();
    QBrush charBrush = charFormat.foreground();
    QFont font(charFormat.font());
    QColor charColor = charBrush.color();
 
    QString imageText = "AA";
 
    painter->setFont(font);
    painter->setPen(charColor); 
 
    qDebug()  << rect << " ; " << painter->pen() << " ; " << painter->font();
 
    painter->drawText(rect, Qt::AlignBottom, imageText);
 
    QRectF rect1(rect);
    rect1.translate(-30, 0);  // move new rect a little bit to the left to draw on left margin
 
     imageText = "B";
 
     qDebug()  << rect1 << " ; " << painter->pen() << " ; " << painter->font();
 
    painter->drawText(rect1, Qt::AlignBottom, imageText);
 
}

And this works fine. AA is drawn on start of text block and B is drawn on left margin.
But, when I select some text in the text block AA is still visible, but B disappears.

Debug print is not changed when text in block is selected (still show correct rect size and position, and pen and font colors) but text B is not visible.

Any idea??? I sopose that drawObject is not intended for drawing outsidee the QTextBlock rectangle or something like that but I am sure that there is a way to override this problem, just I do not see it.