ADDITIONAL SYSTEM INFORMATION :
Windows

A DESCRIPTION OF THE PROBLEM :
when we right click for context menu, the first option in the list is being highlighted without hovering the mouse. This happens only for the first time right click after the application is opened. This behavior is observed from javafx-9. Till javafx-8 its working fine.

REGRESSION : Last worked in version 8u212

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
try with the below code:

    import javafx.application.Application;
    import javafx.scene.Scene;
    import javafx.scene.control.ContextMenu;
    import javafx.scene.control.Label;
    import javafx.scene.control.MenuItem;
    import javafx.scene.layout.TilePane;
    import javafx.stage.Stage;
    
    public class SampleContextMenu extends Application {
        // labels
        Label l;
    
        public static void main(String args[]) {
            // launch the application
            launch(args);
        }
    
        // launch the application
        public void start(Stage stage) {
            // set title for the stage
            stage.setTitle("creating contextMenu ");
    
            // create a label
            Label label1 = new Label("This is a ContextMenu example ");
    
            // create a menu
            ContextMenu contextMenu = new ContextMenu();
    
            // create menuitems
            MenuItem menuItem1 = new MenuItem("menu item 1");
            MenuItem menuItem2 = new MenuItem("menu item 2");
            MenuItem menuItem3 = new MenuItem("menu item 3");
    
            // add menu items to menu
            contextMenu.getItems().add(menuItem1);
            contextMenu.getItems().add(menuItem2);
            contextMenu.getItems().add(menuItem3);
    
            // create a tilepane
            TilePane tilePane = new TilePane(label1);
    
            // setContextMenu to label
            label1.setContextMenu(contextMenu);
    
            // create a scene
            Scene sc = new Scene(tilePane, 200, 200);
    
            // set the scene
            stage.setScene(sc);
    
            stage.show();
        }
    }


FREQUENCY : always