QSettings keeps a cache of destroyed items

QString v,v1;
// Starting a Scope for QSetting 
{ 
    QSettings settings("test1.ini", QSettings::IniFormat);
// the following line populates some internal QSettings cache that lives long after the
// settings instance is destroyed.
    v = settings.value("lang").toString();
//The value for v is unreadable since the original value is encoded in "UTF-8"

}
//Creating a new QSetting in order to access  values with a different codec
QSettings settings1("test1.ini", QSettings::IniFormat);
// the following line doesn't affect anything because the value we'll need is already in cache
// and the value is not updated with the setting of the codec
settings1.setIniCodec("UTF-8");
// Hence the following value is same as v and is not displayed correctly according to the correct 
//codec used in the ini file.
v1 = settings1.value("lang").toString();