Hi,

  In the below example ,


import javafx.application.Application;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;

import com.sun.prism.impl.Disposer.Record;


public class TableViewDeleteSample extends Application {
    
    private TableView<Person> tableView = new TableView<Person>();
  

    private final ObservableList<Person> data =
            FXCollections.observableArrayList(
            new Person("Eliza", "Smith", "eliza.smith@javafxpro.com"),
            new Person("Isabella", "Johnson", "isabella.johnson@javafxpro.com"),
            new Person("Imran", "Williams", "imran.williams@javafxpro.com"),
            new Person("Emma", "Jones", "emma.jones@javafxpro.com"),
            new Person("Russel", "Peters", "russel.peters@javafxpro.com"));

    
    public static class Person {
      
        private final SimpleStringProperty firstName;
        private final SimpleStringProperty lastName;
        private final SimpleStringProperty email;

        private Person(String fName, String lName, String email) {
            this.firstName = new SimpleStringProperty(fName);
            this.lastName = new SimpleStringProperty(lName);
            this.email = new SimpleStringProperty(email);
        }

        public String getFirstName() {
            return firstName.get();
        }

        public void setFirstName(String fName) {
            firstName.set(fName);
        }

        public String getLastName() {
            return lastName.get();
        }

        public void setLastName(String fName) {
            lastName.set(fName);
        }

        public String getEmail() {
            return email.get();
        }

        public void setEmail(String fName) {
            email.set(fName);
        }
    }
    
    @SuppressWarnings("unchecked")
 @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Table With Delete Row");
        tableView.setEditable(false);
        
        TableColumn<Person, String> firstName = new TableColumn<Person, String>("First Name");
        TableColumn<Person, String> lastName = new TableColumn<Person, String>("Last Name");
        TableColumn<Person, String> email = new TableColumn<Person, String>("Email");
        
        TableColumn<Person, String> firstName1 = new TableColumn<Person, String>("First Name Dup");
        TableColumn<Person, String> lastName1 = new TableColumn<Person, String>("Last Name Dup");
        TableColumn<Person, String> email1 = new TableColumn<Person, String>("Email Dup");
        
        
        firstName.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName"));
        lastName.setCellValueFactory(new PropertyValueFactory<Person, String>("lastName"));
        email.setCellValueFactory(new PropertyValueFactory<Person, String>("email"));
        
         firstName1.setCellValueFactory(new PropertyValueFactory<Person, String>("firstName"));
        lastName1.setCellValueFactory(new PropertyValueFactory<Person, String>("lastName"));
        email1.setCellValueFactory(new PropertyValueFactory<Person, String>("email"));
        
        tableView.getColumns().add(firstName);
        tableView.getColumns().add(lastName);
        tableView.getColumns().add(email);
        
        tableView.getColumns().add(firstName1);
        tableView.getColumns().add(lastName1);
        tableView.getColumns().add(email1);
        
        //Insert Button
        TableColumn col_action = new TableColumn<>("Action");
        tableView.getColumns().add(col_action);
        
        col_action.setCellValueFactory(
                new Callback<TableColumn.CellDataFeatures<Record, Boolean>,
                ObservableValue<Boolean>>() {

            @Override
            public ObservableValue<Boolean> call(TableColumn.CellDataFeatures<Record, Boolean> p) {
                return new SimpleBooleanProperty(p.getValue() != null);
            }
        });

        //Adding the Button to the cell
        col_action.setCellFactory(
                new Callback<TableColumn<Record, Boolean>, TableCell<Record, Boolean>>() {

            @Override
            public TableCell<Record, Boolean> call(TableColumn<Record, Boolean> p) {
                return new ButtonCell();
            }
        
        });
        
        
        tableView.setItems(data);
        
        VBox vBox = new VBox();
        vBox.getChildren().addAll(tableView);
        primaryStage.setScene(new Scene(vBox, 440, 400));
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
    
    //Define the button cell
    private class ButtonCell extends TableCell<Record, Boolean> {
        final Button cellButton = new Button("Delete");
        
        ButtonCell(){
            
         //Action when the button is pressed
            cellButton.setOnAction(new EventHandler<ActionEvent>(){

                @Override
                public void handle(ActionEvent t) {
                    // get Selected Item
                 Person currentPerson = (Person) ButtonCell.this.getTableView().getItems().get(ButtonCell.this.getIndex());
                 //remove selected item from the table list
                 data.remove(currentPerson);
                }
            });
        }

        //Display button if the row is not empty
        @Override
        protected void updateItem(Boolean t, boolean empty) {
            super.updateItem(t, empty);
            if(!empty){
                setGraphic(cellButton);
            }
        }
    }
}
   I moved the horizontal scrollbar to right and then maximized the window to full.
   After that the column headings are not aligned properly with the column values.
  When I click on any column header then the header aligns with the content.

If it is a known issue , is there any workaround for this?