For some reason using addWidget function in QGraphicsScene class makes the related QGraphicsView widget receive mouseMoveEvents without mousebutton pressed and mouse tracking off.

MyView.h :

#pragma once

#include <qgraphicsview>
#include <qevent>
#include <qgraphicsscene>
class MyView : public QGraphicsView // subclassing QGraphicsView
{
    Q_OBJECT
protected:
    void mouseMoveEvent(QMouseEvent* event);


public:
    MyView(QGraphicsScene* scene, QWidget *parent);
    ~MyView();
};

MyView.cpp:

#include "MyView.h"

MyView::MyView(QGraphicsScene* scene, QWidget* parent)
    : QGraphicsView(scene, parent)
{}

void MyView::mouseMoveEvent(QMouseEvent* event)
{
    qDebug() << this->hasMouseTracking(); // indicating that the event goes on 
                                              // even though I dont't press any buttons
                                              // and mouse tracking is disabled by default
}

MyView::~MyView()
{}

QMainWindow.cpp :

QVBoxLayout* layout = new QVBoxLayout();
ui.centralWidget->setLayout(layout);
QGraphicsScene* scene = new QGraphicsScene();
scene->addWidget(new QWidget());
MyView* v = new MyView(scene, ui.centralWidget);
layout->addWidget(v);

This happens only after adding QWidget or its subclass in the scene.
Qt version is 6.7.0