QSettings dont save updated variables by QML

[Bedopies]

Hello, I have an app where user can change a variables - delays, hotkeys etc. I do the "config saver" but it recieve "old" (not updated) variables. "Variable check" in same class working, but in other class shows others.

void Building::setWindowName(QString value){
    connect(this, SIGNAL (textChanged(QString)), this, SLOT(setWindowName(QString)));
    sett.windowName = value;
    sett.windowID = (const wchar_t*) sett.windowName.utf16();
    qDebug() << "windowName " << sett.windowName; //Shows updated
}

void Building::setWindowName(QString value){
    connect(this, SIGNAL (textChanged(QString)), this, SLOT(setWindowName(QString)));
    sett.windowName = value;
    sett.windowID = (const wchar_t*) sett.windowName.utf16();
    qDebug() << "windowName " << sett.windowName; //Shows updated
}

To copy to clipboard, switch view to plain text mode 

class Settings : public QObject
{
    Q_OBJECT
 
public:
    explicit Settings(QObject *parent = nullptr);
    QSettings* sett;
 
    int toggleButton=0x52;
    int btoggleButton=0x52;// r
    int inventoryKey=0x45; // e
    int minCpsDelay = 10;
    int maxCpsDelay = 15;
 
    QString windowName = "Minecraft 1.8.8 (Blazingpack.pl)";
    LPCWSTR windowID = (const wchar_t*) windowName.utf16();

class Settings : public QObject
{
    Q_OBJECT

public:
    explicit Settings(QObject *parent = nullptr);
    QSettings* sett;

    int toggleButton=0x52;
    int btoggleButton=0x52;// r
    int inventoryKey=0x45; // e
    int minCpsDelay = 10;
    int maxCpsDelay = 15;

    QString windowName = "Minecraft 1.8.8 (Blazingpack.pl)";
    LPCWSTR windowID = (const wchar_t*) windowName.utf16();

To copy to clipboard, switch view to plain text mode 

void Settings::clickcheck()
{
    qDebug() << windowName; //Showed old - not updated variable.
}

void Settings::clickcheck()
{
    qDebug() << windowName; //Showed old - not updated variable.
}

To copy to clipboard, switch view to plain text mode 

I just want to save some data from different classes.