Grid: set single header cell invisible?

Hi,

I just found a strange behavior in the Grid (using Vaadin 7.5.9).
The Grid should have filters for each coulmn, but for one column I want to set the filter to invisible.
Now the effect is, that not only the specified header filter is invisible, but more.

Is this  a bug?
What do I have to do to set one single column filter to invisble?

Here is a simplified example:

import javax.servlet.annotation.WebServlet;
import com.vaadin.annotations.Theme;
import com.vaadin.annotations.VaadinServletConfiguration;
import com.vaadin.annotations.Widgetset;
import com.vaadin.data.util.BeanItemContainer;
import com.vaadin.data.util.filter.SimpleStringFilter;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.ui.Grid;
import com.vaadin.ui.TextField;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;

/**
*
*/
@Theme("mytheme")
@Widgetset("ch.sic.MyAppWidgetset")
public class MyUI extends UI {

@Override
protected void init(VaadinRequest vaadinRequest) {
final VerticalLayout layout = new VerticalLayout();
layout.setMargin(true);
setContent(layout);

Grid grid = new Grid();
BeanItemContainer<ExampleListItem> container = new BeanItemContainer<>(ExampleListItem.class);

grid.setContainerDataSource(container);
grid.setColumnOrder("id", "service", "reference");

// Create a header row to hold column filters
Grid.HeaderRow filterRow = grid.appendHeaderRow();


// Set up a filter for all columns
for (Object pid: grid.getContainerDataSource().getContainerPropertyIds()) {
Grid.HeaderCell cell = filterRow.getCell(pid);

// Have an input field to use for filter
TextField filterField = new TextField();
filterField.setColumns(8);

// Update filter When the filter input is changed
filterField.addTextChangeListener(change -> {
// Can't modify filters so need to replace
container.removeContainerFilters(pid);

// (Re)create the filter if necessary
if (! change.getText().isEmpty())
container.addContainerFilter(
new SimpleStringFilter(pid,
change.getText(), true, false));
});
cell.setComponent(filterField);
}


Grid.HeaderCell reference = filterRow.getCell("service");
reference.getComponent().setVisible(false);

layout.addComponent(grid);

}

@WebServlet(urlPatterns = "/*", name = "MyUIServlet", asyncSupported = true)
@VaadinServletConfiguration(ui = MyUI.class, productionMode = false)
public static class MyUIServlet extends VaadinServlet {}

}

public class ExampleListItem {

  private Long id;

  private String service;

  private String reference;

  public String getService() {
    return this.service;
  }

  public void setService(String service) {
    this.service = service;
  }

  public String getReference() {
    return this.reference;
  }

  public void setReference(String reference) {
    this.reference = reference;
  }

  public Long getId() {
    return this.id;
  }

  public void setId(Long id) {
    this.id = id;
  }
}