QGraphicsScene::addPath(QPainterPath(QPointF)) always initiates path at origin

I had the following code in my program, where I am trying to make a pen tool similar to adobe illustrator. 

pathBeingDrawn = mainScene->addPath(QPainterPath(mouseClickPosition));

Here, the classes are

QGraphicsPathItem *pathBeingDrawn; QGraphicsScene *mainScene; QPointF mouseClickPosition;

Anyways, any attempt to draw the path results in the pathBeingDrawn initiating at the origin, even if mouseClickPosition is not QPointF(0,0). I know I can easily resolve this in my code with 

QPainterPath p(); p.moveTo(mouseClickPosition); pathBeingDrawn->setPath(p);

But I only wish to point out the bug here. Ideally, if there's

QPainterPath(mouseClickPosition);

then I shouldn't have to substitute it with

QPainterPath p(); p.moveTo(mouseClickPosition); pathBeingDrawn->setPath(p);

on the graphics scene. 

If this is not really a bug, let me know. Though I'm not sure I understand the point of the constructor

QPainterPath(QPointF &startPoint)

The image attached should give a good example of what I mean.