A DESCRIPTION OF THE PROBLEM :
Pagination disappears when setting new one on scene

Run the attached class to see that when the 'disappear' flag is true
and the pagination is not wrapped in a HBox it will disappear.
This does not happen when it is wrapped in a HBox.

In general I think the pagination control is pretty buggy. There are
several open bugs for it here.
I personally run into this one and #8089578 when writing simple tests for it in our application.

This bug could be related to #8088490


CUSTOMER SUBMITTED WORKAROUND :
import javafx.application.Application;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Pagination;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class PaginationDisappear extends Application
{

  private boolean disappear = false;

  @Override
  public void start(Stage stage) throws Exception
  {
    Pagination pagination = new Pagination(15);
    pagination.setMaxPageIndicatorCount(5);
    Label label = new Label();
    pagination.setPageFactory(index -> {
      label.setText("" + (index + 1));
      try
      {
        if(index != 0)
          start(stage);
      }
      catch (Exception e)
      {
        e.printStackTrace();
      }
      return label;
    });
    Parent parent = pagination;
    if(!disappear)
      parent = new HBox(pagination);
    stage.setScene(new Scene(parent));
    stage.show();
  }
  
  public static void main(String[] args)
  {
    Application.launch(PaginationDisappear.class);
  }

}


FREQUENCY : always