JavaFX simple app - illustration of bug setting text fill color inside a Label

style.css

.root {
    -fx-base: #1d1d1d;
    -icons-color: rgb(61, 114, 144);
}

.line {
    -fx-font-family: Lucida;
    -fx-font-size: 18px;
}

.line.selected {
    -fx-background-color: -fx-focus-color;
    -fx-text-fill: derive(-fx-focus-color, -80%);
}

TestApp.java

package app;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.SplitPane;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.stage.Stage;

import java.util.List;
import java.util.function.Consumer;

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

    @Override
    public void start( Stage primaryStage ) throws Exception {
        var css = TestApp.class.getResource( "/style.css" ).toExternalForm();
        var pane = new SplitPane( makePane(), makePane() );

        primaryStage.setWidth( 400.0 );
        primaryStage.setHeight( 400.0 );
        primaryStage.setTitle( "Test" );

        Scene scene = new Scene( pane );
        scene.getStylesheets().add( css );
        primaryStage.setScene( scene );
        primaryStage.show();
    }

    Node makePane() {
        var box = new VBox( 0 );
        Consumer<Label> changeSelection = ( label ) -> {
            for ( Node child : box.getChildren() ) {
                if ( child instanceof Label ) {
                    if ( child == label && !child.getStyleClass().contains( "selected" ) )
                        child.getStyleClass().add( "selected" );
                    else child.getStyleClass().remove( "selected" );
                }
            }
        };
        box.getChildren().addAll( List.of(
                new MyLabel( changeSelection ),
                new MyLabel( changeSelection ),
                new MyLabel( changeSelection ),
                new HBox( 10, makeButton( "OK", box ) )
        ) );
        return box;
    }

    private static Button makeButton( String text, Parent parent ) {
        var button = new Button( text );
        button.setOnAction( event -> {
            for ( Node node : parent.getChildrenUnmodifiable() ) {
                if ( node instanceof MyLabel myLabel ) {
                    myLabel.resetColor();
                }
            }
        } );
        return button;
    }
}

class MyLabel extends Label {
    public MyLabel( Consumer<Label> changeSelection ) {
        setBackground( new Background( new BackgroundFill( Color.BLACK, CornerRadii.EMPTY, Insets.EMPTY ) ) );
        getStyleClass().add( "line" );
        setTextFill( Color.YELLOW );
        setText( "Hello world" );
        setMinWidth( 200.0 );
        setOnMouseClicked( event -> changeSelection.accept( this ) );
    }

    void resetColor() {
        setTextFill( Color.YELLOW );
    }
}