ADDITIONAL SYSTEM INFORMATION :
Linux / Fedora 37 (x64)
Tested with Java 23.0.1 and JavaFX 23.0.1 / 24-ea+19

A DESCRIPTION OF THE PROBLEM :
Current javadoc says:

 /**
     * Moves mouse pointer to given screen coordinates.
     * @param x X position
     * @param y Y position
     */
    public synchronized void mouseMove(int x, int y) {


However, Robot.mouseMove() does not move the mouse cursor visually, but the following Robot.mousePress() is delivered to the correct place. This is the same bug as JDK-8280995 but this bug report is for AWT.

It works as expected with:
- JavaFX robot with Java 23.0.1 and JavaFX 23.0.1 on Windows 10.

It doesn't work as expected with:
- JavaFX robot with Java 23.0.1 and JavaFX 23.0.1 on Fedora 37.
- JavaFX robot with Java 23.0.1 and JavaFX 24-ea+19 on Fedora 37.
- AWT robot with Java 23.0.1 and JavaFX 24-ea+19 on Fedora 37 (I get the same buggy behaviour with both AWT and JavaFX robots).


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1/ Compile the attached code.
2/ Launch the resulting jar.
3/ Click on the button named "test robot" with your mouse.
4/ Type on the key Space to close the dialogbox that has just popped up.
5/ Click again on the left button of the mouse.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
After step 3/, the mouse pointer should have moved above the button named "display hello".
ACTUAL -
After step 3/, the mouse pointer is still above the button named "test robot". But when clicking on the mouse at step 5/ without moving the mouse, the click gets registered on the button named "display hello", which is quite confusing.

---------- BEGIN SOURCE ----------
package com.mycompany.mavenproject3;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Dialog;
import javafx.scene.input.MouseButton;
import javafx.scene.layout.FlowPane;
import javafx.scene.robot.Robot;
import javafx.stage.Stage;


/**
 * JavaFX App
 */
public class App extends Application {

    @Override
    public void start(Stage stage) {
        var button = new Button("test robot");
        var button2 = new Button("display hello");
        var scene = new Scene(new FlowPane(button, button2), 640, 480);
        stage.setScene(scene);
        stage.show();
        
        button.setOnAction(e -> {
            Robot robot = new Robot();
            robot.mouseMove(button2.localToScreen(1, 1));
            robot.mouseClick(MouseButton.PRIMARY);
        });
        button2.setOnAction(e -> {
            Dialog<String> dialog = new Dialog();
            dialog.setContentText("hello");
            dialog.getDialogPane().getButtonTypes().add(ButtonType.OK);
            dialog.show();
        });
    }

    public static void main(String[] args) {
        launch();
    }

}
---------- END SOURCE ----------

FREQUENCY : always