When editing a tableview if i try to add tonic in word it appears like this :  kalim'era while the proper is the tonic to go above e 

Interesting is that i don't have that issue in textfield ....
Providing a test :

import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.application.Platform;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableColumn.CellEditEvent;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
//import javafx.scene.control.cell.CheckBoxTableCell;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.stage.Stage;
import javafx.util.Callback;


/**
 * FXML Controller class
 *
 * @author balz
 */
public class UploadTemplateController extends Application {

    @Override public void start(Stage primaryStage) throws Exception {
        init(primaryStage);
        primaryStage.show();
    }
    public static void main(String[] args) { launch(args); }

    private void init(Stage primaryStage) {
        Group root = new Group();
        primaryStage.setScene(new Scene(root));
        MasterUploadParameter objMasterUploadParameter=new MasterUploadParameter();
        MasterUploadParameter objMasterUploadParameter1=new MasterUploadParameter();
        MasterUploadParameter objMasterUploadParameter2=new MasterUploadParameter();

        final ObservableList<MasterUploadParameter> tableContent =
            FXCollections.observableArrayList
            (
                objMasterUploadParameter,
                objMasterUploadParameter1,
                objMasterUploadParameter2
            );

        Callback<TableColumn, TableCell> cellFactory = new Callback<TableColumn, TableCell>() {
            public TableCell call(TableColumn p) {
                return new EditingCell();
            }
        };

        TableColumn ColumnID = new TableColumn();
        ColumnID.setText("columnId");
        ColumnID.setCellValueFactory(new PropertyValueFactory("columnId"));
        ColumnID.setCellFactory(cellFactory);
        ColumnID.setOnEditCommit(new EventHandler<CellEditEvent<MasterUploadParameter, String>>() {
            @Override
            public void handle(CellEditEvent<MasterUploadParameter, String> evt) {
                try {
                    evt.getTableView().getItems().get(evt.getTablePosition().getRow())
                            .columnId.set(Integer.parseInt(evt.getNewValue()));
                } catch (NumberFormatException numberFormatException) {
                    //do whatever if a non int is entered
                }
            }
        });

        TableColumn columnDesc = new TableColumn("Desc");
        columnDesc.setCellValueFactory(new PropertyValueFactory("desc"));
        columnDesc.setCellFactory(cellFactory);
        columnDesc.setOnEditCommit(new EventHandler<CellEditEvent<MasterUploadParameter, String>>() {
            @Override
            public void handle(CellEditEvent<MasterUploadParameter, String> evt) {
                evt.getTableView().getItems().get(evt.getTablePosition().getRow())
                        .desc.set(evt.getNewValue());
            }
        });

        TableView tableView = new TableView();
        tableView.setItems(tableContent);
        //Enabling editing
        tableView.setEditable(true);
        tableView.getColumns().addAll(ColumnID, columnDesc);
        root.getChildren().add(tableView); 
    }

    public static class MasterUploadParameter {
        private SimpleIntegerProperty columnId;
        public SimpleIntegerProperty columnIdProperty() {return columnId;}

        private StringProperty desc;
        public StringProperty descProperty() {return desc;}

        public MasterUploadParameter() {
            this.columnId=new SimpleIntegerProperty(0);
            this.desc = new SimpleStringProperty("hi");
        }
    }
    // EditingCell - for editing capability in a TableCell
    public static class EditingCell extends TableCell{
        private TextField textField;

        @Override public void startEdit() {
            if (!isEmpty()) {
                super.startEdit();
                createTextField();
                setText(null);
                setGraphic(textField);
                textField.selectAll();
                Platform.runLater(new Runnable() {
                    @Override
                    public void run() {
                        textField.requestFocus();
                    }
                });
            }
        }

        @Override public void cancelEdit() {
            super.cancelEdit();

            try {
                setText(getItem().toString());
            } catch (Exception e) {
            }
            setGraphic(null);
        }

        @Override public void updateItem(Object item, boolean empty) {
            System.out.println("find value of update: "+empty+item);
            super.updateItem(item, empty);
            if (empty) {
                setText(null);
                setGraphic(null);
            } else {
                if (isEditing()) {
                    if (textField != null) {
                        textField.setText(getString());
                    }
                    setText(null);
                    setGraphic(textField);
                } else {
                    setText(getString());
                    setGraphic(null);
                }
            }
        }

        private void createTextField() {
            textField = new TextField(getString());
            textField.setMinWidth(this.getWidth() - this.getGraphicTextGap() * 2);
            textField.setOnKeyReleased(new EventHandler<KeyEvent>() {                
                @Override public void handle(KeyEvent t) {
                    if (t.getCode() == KeyCode.ENTER) {
                        commitEdit(textField.getText());
                    } else if (t.getCode() == KeyCode.ESCAPE) {
                        cancelEdit();
                    }
                }
            });
        }

        private String getString() {
            return getItem() == null ? "" : getItem().toString();
        }

    } 


}