ADDITIONAL SYSTEM INFORMATION :
Linux hostname 5.11.10-arch1-1 #1 SMP PREEMPT Fri, 26 Mar 2021 00:11:29 +0000 x86_64 GNU/Linux (XFCE)

openjdk version "16" 2021-03-16
OpenJDK Runtime Environment (build 16+36)
OpenJDK 64-Bit Server VM (build 16+36, mixed mode, sharing)


A DESCRIPTION OF THE PROBLEM :
Upon selecting an existing file from the FileChooser dialog, the user can no longer interact with all application elements. This may be similar to:

https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8088558


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
0. Create a temporary file (e.g., touch $HOME/test.txt)
1. Run the application.
2. Type in some text (e.g., XYZ)
3. Click File menu
4. Click Save As menu item
5. Browse to the directory of the file (e.g., $HOME)
6. Click test.txt to select it
7. Click Save button
8. Click Replace button to confirm replacing
9. Click File menu

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
(a) File menu opens.
(b) The caret remains visible.

ACTUAL -
(a) The file menu does not open.
(b) The caret is no longer visible.


---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.event.*;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.scene.layout.BorderPane;
import javafx.stage.*;

public final class MainApp extends Application {
  public static void main( final String[] args ) {
    launch( args );
  }

  @Override
  public void start( final Stage stage ) {
    final var root = new Group();
    final var scene = new Scene( root, 400, 400 );
    final var pane = new BorderPane();
    final var menuBar = new MenuBar();
    final var menu = new Menu( "File" );
    final var file = new MenuItem( "Save As" );
    final var textArea = new TextArea();

    file.setOnAction( e -> new FileChooser().showSaveDialog( scene.getWindow() ) );

    menu.getItems().add( file );
    menuBar.getMenus().add( menu );

    pane.prefHeightProperty().bind( scene.heightProperty() );
    pane.prefWidthProperty().bind( scene.widthProperty() );
    pane.setTop( menuBar );
    pane.setCenter( textArea );
    root.getChildren().add( pane );

    stage.setScene( scene );
    stage.show();
  }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
User must relinquish application focus, then return to the application. (This can be accomplished by clicking outside the application, selecting the system menu, pressing Alt+Tab, etc.)

FREQUENCY : always