Пропадают линии при ZoomIn в QGraphicsView

void Chip::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    Q_UNUSED(widget);
 
    QColor fillColor = (option->state & QStyle::State_Selected) ? color.dark(150) : color;
    if (option->state & QStyle::State_MouseOver)
        fillColor = fillColor.light(125);
 
    const qreal lod = option->levelOfDetailFromTransform(painter->worldTransform());
    if (lod < 0.2) {
        if (lod < 0.125) {
            painter->fillRect(QRectF(0, 0, 110, 70), fillColor);
            return;
        }
 
        QBrush b = painter->brush();
        painter->setBrush(fillColor);
        painter->drawRect(13, 13, 97, 57);
        painter->setBrush(b);
        return;
    }
 
    QPen oldPen = painter->pen();
    QPen pen = oldPen;
    int width = 0;
    if (option->state & QStyle::State_Selected)
        width += 2;
 
    pen.setWidth(width);
    QBrush b = painter->brush();
    painter->setBrush(QBrush(fillColor.dark(option->state & QStyle::State_Sunken ? 120 : 100)));
 
    painter->drawRect(QRect(14, 14, 79, 39));
    painter->setBrush(b);
 
    if (lod >= 1) {
        painter->setPen(QPen(Qt::gray, 1));
        painter->drawLine(15, 54, 94, 54);
        painter->drawLine(94, 53, 94, 15);
        painter->setPen(QPen(Qt::black, 0));
    }
 
    // Draw text
    if (lod >= 2) {
        QFont font("Times", 10);
        font.setStyleStrategy(QFont::ForceOutline);
        painter->setFont(font);
        painter->save();
        painter->scale(0.1, 0.1);
        painter->drawText(170, 180, QString("Model: VSC-2000 (Very Small Chip) at %1x%2").arg(x).arg(y));
        painter->drawText(170, 200, QString("Serial number: DLWR-WEER-123L-ZZ33-SDSJ"));
        painter->drawText(170, 220, QString("Manufacturer: Chip Manufacturer"));
        painter->restore();
    }
 
    // Draw lines
    QVarLengthArray<QLineF, 36> lines;
    if (lod >= 0.5) {
        for (int i = 0; i <= 10; i += (lod > 0.5 ? 1 : 2)) {
            lines.append(QLineF(18 + 7 * i, 13, 18 + 7 * i, 5));
            lines.append(QLineF(18 + 7 * i, 54, 18 + 7 * i, 62));
        }
        for (int i = 0; i <= 6; i += (lod > 0.5 ? 1 : 2)) {
            lines.append(QLineF(5, 18 + i * 5, 13, 18 + i * 5));
            lines.append(QLineF(94, 18 + i * 5, 102, 18 + i * 5));
        }
    }
    if (lod >= 0.4) {
        const QLineF lineData[] = {
            QLineF(25, 35, 35, 35),
            QLineF(35, 30, 35, 40),
            QLineF(35, 30, 45, 35),
            QLineF(35, 40, 45, 35),
            QLineF(45, 30, 45, 40),
            QLineF(45, 35, 55, 35)
        };
        lines.append(lineData, 6);
    }
    painter->drawLines(lines.data(), lines.size());
 
    // Draw red ink
    if (stuff.size() > 1) {
        QPen p = painter->pen();
        painter->setPen(QPen(Qt::red, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
        painter->setBrush(Qt::NoBrush);
        QPainterPath path;
        path.moveTo(stuff.first());
        for (int i = 1; i < stuff.size(); ++i)
            path.lineTo(stuff.at(i));
        painter->drawPath(path);
        painter->setPen(p);
    }
}