Marker doesn't display in Rviz

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Hello everyone,

I get some question when I wanna display a marker in Rviz.

Here is my code:

location_mark_pub_ = nh_.advertise<visualization_msgs::MarkerArray>("/tiffer_panel/Navigation/KnownLocations", 2, true);

bool TifferPanel::addLocation(const geometry_msgs::Pose &pose, const std::string &name)
{
    if(location_manager_->knownLocation(name))
    {
        if(QMessageBox::question(this, QString::fromUtf8("confirm"),
             QString::fromStdString(name) + QString::fromUtf8(" existed, Yes to update. "),
                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::StandardButton::No)
             return false;
        else
            location_box_->addItem(QString::fromStdString(name));
        location_manager_->addLocation(name, pose);

        publishLocationsToRviz();
        return true;
    }
}

void TifferPanel::publishLocationsToRviz()
{
    location_marks_.markers.clear();
    for(auto&it : location_manager_->getLocations())
    {
        visualization_msgs::Marker new_mark;
        new_mark.header.frame_id = "map";
        new_mark.header.stamp = ros::Time::now();
        new_mark.id = location_marks_.markers.size();
        new_mark.action = new_mark.ADD;
        new_mark.type = new_mark.TEXT_VIEW_FACING;
        new_mark.pose = it.second.location;
        new_mark.pose.position.z = 0.15;
        new_mark.text = it.first;
        new_mark.scale.z = 0.5;
        new_mark.color.r = new_mark.color.a = 1;
        location_marks_.markers.push_back(new_mark);
    }
    location_mark_pub_.publish(location_marks_);
}

But when I cliked button on my panel and enter marker's text, there is nothing new in Rviz.

I add MarkerArray and choose the right marker topic.

I test my panel with rbx1 package, and use roslaunch rbx1_nav fake_nav_test.launch

Can someone tell me what wrong with it?