QBrush scale transformation is not applied correctly in Qt 6

In the attached project, the custom widgets are filled with a pattern with predefined scales:

    void paintEvent( QPaintEvent* e ) override
    {
        QPainter p( this );

        QBrush br = QBrush( Qt::blue, Qt::CrossPattern );
        QTransform tr;
        tr.scale( mScale, mScale );
        br.setTransform( tr );

        p.fillRect( e->rect(), br );
    }

With Qt 5.15.2, the widgets have a correct scale of pattern:

• OK_qbrush_scale_mac_5.15.2.png
• OK_qbrush_scale_win_5.15.2.png

With Qt 6.3.1, the widgets have the same scale:

• FAIL_qbrush_scale_mac_6.3.1.png
• FAIL_qbrush_scale_win_6.3.1.png

Note, on macOS (retina screen) with Qt 6.3.1 the scale is even smaller than on Windows, while with Qt 5.15.2 they are equal.

QGraphicsScene and QGraphicsView are also affected, setBackgroundBrush method produces the same result.