QSetting setValue("", float) does not work for all Qt apps running on iOS 10 and macOS Sierra

QSettings settings;
settings.setValue("test", 1.0f);

QSetting settings;
bool bOk;
setting.value("test", 1.0).toFloat(&bOk); // bOk is always false and 0 is returned

void setSettings() {
QSettings settings;
settings.setValue("test", 1.0);
}

void loadSettings() {
QSetting settings;
bool bOk;
setting.value("test", 1.0).toReal(&bOk); // bOk
}