qt5.10 windowsXp strange conflict in displaying rendered Qpixmap in a graphicsView

[artome]

I still haven't a clue what is going on but I can confirm that the problem is in fact with the rendering of the pixmap on the scene as the program works when i comment the addPixmap and add a simple test instead

//scene.addPixmap(*renderer);
scene.addText("Hello, world!");

//scene.addPixmap(*renderer);
scene.addText("Hello, world!");

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