ADDITIONAL SYSTEM INFORMATION :
macOS 10.15 Catalina (19A602 - final build with supplemental update)
OpenJFX8, OpenJFX13

A DESCRIPTION OF THE PROBLEM :
This is an update to the bug mentioned in JDK-8231513.
Since we couldn't post updates to that issue, we had to create this duplicate ticket.

Our research showed that the issue comes from calling "CGEventTapCreate" here:
https://github.com/openjdk/jfx/blob/master/modules/javafx.graphics/src/main/native-glass/mac/GlassTouches.m#L198

Building the JavaFX with that logic commented out fixed the problem - but of course it's not a proper fix, just a proof of theory.

Idea for looking at "CGEventTapCreate" was taken from following comment:
https://www.reddit.com/r/privacy/comments/cw8772/backup_and_sync_from_google_would_like_to_receive/f3p0c29/

Background for the issue once again:
due to stricter security measures in macOS 10.15 Catalina, launching JavaFX app causes OS to show following prompt:

"{appname}" would like to receive keystrokes from any application.
Grant access to this application in Security & Privacy preferences, located in System Preferences

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Launch any JavaFX app that shows a Stage on macOS 10.15 Catalina

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
macOS doesn't show a prompt to ask for permission to receive keystrokes when JavaFX app doesn't need it
ACTUAL -
macOS shows a prompt to ask for permission to receive keystrokes when JavaFX app doesn't need it

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

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

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Hello World!");
        StackPane root = new StackPane();
        primaryStage.setScene(new Scene(root, 300, 250));
        primaryStage.show();
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Comment out logic that uses "CGEventTapCreate" here:
https://github.com/openjdk/jfx/blob/master/modules/javafx.graphics/src/main/native-glass/mac/GlassTouches.m#L198

FREQUENCY : always