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 mouse cursor visually, but following Robot.mousePress() is delivered to correct place.

As a possible solution we can consider implementing robot via libEI JDK-8280983