ADDITIONAL SYSTEM INFORMATION :
Microsoft Windows [Version 10.0.18363.1198]
openjdk version "11.0.5" 2019-10-15
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.5+10)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.5+10, mixed mode)

A DESCRIPTION OF THE PROBLEM :
Creating ScrollPane with same content component causes memory leak until the component is removed from the scene.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Open provided ScrollPaneLeakTest.
2. Keep pressing the "test' button.
3. Invoke GC and observe the ScrollPane count in memory analyzing tools - jvisualvm or Eclipse MAT. 

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
After 3. the ScrollPane count should be 1.
ACTUAL -
Aftery 3. every time the button is pressed, the ScrollPane is created, it is present in heap dump.

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ScrollPane;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class ScrollPaneLeakTest
{

    public static void main( String[] args )
    {
        Application.launch( FxApp.class, args );
    }

    public static class FxApp extends Application
    {

        @Override
        public void start( final Stage primaryStage ) throws Exception
        {
            System.err.println( System.getProperty( "javafx.version" ) );
            final var testLabel = new Label( "Test label" );

            final var rootPane = new BorderPane();
            final var testButton = new Button( "test" );
            testButton.setOnAction( e -> {
                rootPane.setCenter( new ScrollPane( testLabel ) );
            } );
            rootPane.setTop( testButton );
            rootPane.setCenter( new ScrollPane( testLabel ) );
            primaryStage.setScene( new Scene( rootPane, 800, 600 ) );
            primaryStage.show();
        }

    }

}

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

CUSTOMER SUBMITTED WORKAROUND :
no workaround

FREQUENCY : always