QPainter artifacts when scale() and antialiasing is used

Drawing lines with QPainter:drawLine() can lead to artifacts if QPainter:scale() is used in combination with QPainter:setRenderHints(QPainter::Antialiasing, true).
Removing either QPainter::Antialiasing or QPainter:scale() eleminates the drawing artifacts.

This is a regression: Qt 5.15.2 and prior versions doesn't show this issue.

Example code:

#include <QApplication>
#include <QWidget>
#include <QPainter>

class Widget : public QWidget
{
protected:
    void paintEvent(QPaintEvent *)
    {
        QPainter painter(this);
        painter.setRenderHints(QPainter::Antialiasing, true);

        const auto Width = width();
        const auto Height = height();
        const auto Side = qMin(Width, Height);
        painter.scale(Side / 600.0, Side / 600.0);

        painter.drawLine(QLineF(490.05, 100.0, 490.1, 50.0));
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}

1. This example application draws a single vertical line.
2. After executing the application move its window to the upper left corner of the screen.
3. Then slowly enlarge the application window by dragging the bottom right corner of the application window using the mouse.
4. Then at some point a not intended horizontal line shows up - which is a bug.