My pointer does not point on the same value when its call in a slot QT C++

Question

I do a pokemon project with a Qt interface.

I created a class Trainer and Pokemon :

    class Pokemon
    {
    protected:
        string itsName;
        double itsHP;
    
    public:
        Pokemon(string name, double hp);
        virtual ~Pokemon();
        virtual void attack(Pokemon * pokemon) = 0;
        ...
    };

    class Trainer
    {
        string itsName;
        int itsLevel;
    
        vector<Pokemon *> * itsPokemons;
        Pokemon * itsCurrentPokemon;
    
    public:
        Trainer(string name, int level = 0);
        ~Trainer();
        ...
        vector<Pokemon *> * getItsPokemons() const;

    };

    vector<Pokemon *> *Trainer::getItsPokemons() const
    {
        return itsPokemons;
    }

---

There is the definition of my widget :

    class mainWidget : public QWidget
    {
        Q_OBJECT
    public:
        mainWidget(Trainer * player, Trainer * opponent, QWidget *parent = nullptr);
        ~mainWidget();
    
    
    private slots:
        void onComboBoxChanged(const QString str);
    
    private:
        Ui::Widget *ui;
        Trainer * itsPlayer;
        Trainer * itsOpponent;
    };

mainWidget::mainWidget(Trainer * player, Trainer * opponent,QWidget *parent)
    : QWidget{parent},
      ui(new Ui::Widget),
      itsPlayer(player),
      itsOpponent(opponent)
{
    ui->setupUi(this);

    ui->comboBox->addItem("test1");
    ui->comboBox->addItem("test2");

    cout << "Adress : " << itsPlayer->getItsPokemons() << endl;

    cout << "Vector size : " << itsPlayer->getItsPokemons()->size() << endl;

    connect(ui->comboBox,SIGNAL(currentTextChanged(const QString)), this, SLOT(onComboBoxChanged(const QString)));
}

    mainWidget::~mainWidget()
    {
        delete ui;
    }

In my widget, the QComboBox is connected with this method (its a slot):

    void mainWidget::onComboBoxChanged(const QString str)
    {
        cout << "Adress : " << itsPlayer->getItsPokemons() << endl;

        cout << "Vector size : " << itsPlayer->getItsPokemons()->size() << endl;    
    }

When I execute the code, the cout in the constructor print :

Vector size : 6 // the normal size of my vector
Adress : 0x2536e30

And when I use the QComboBox the cout in the slot print :

Adress : 0x2536e30
Vector size : 18446726501852669075

It seems that in the method onComboBoxChanged the pointer suddenly point on something random.

---

UPDATE : My widget was created as a pointer, but i did not put the key word "explicit" behind the constructor of this one. Its finally work