ADDITIONAL SYSTEM INFORMATION :
OS: Ubuntu 20.04.6 LTS
Java: openjdk version "24.0.2" 2025-07-15

A DESCRIPTION OF THE PROBLEM :
When a Tab containing a graphic node is removed from a TabPane the graphic node is not released even after the original TabPane is detached from the scene. As a result, the original TabPane, its skin remain reachable and cannot be collected by the garbage collector. This leads to a memory leak whenever tabs with graphics are removed.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the provided code and press the “Test” button. After that, run the profiler. You will see results similar to this: <LINK>


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
After pressing the "Test" button, all TabPanes should be eligible for garbage collection.
ACTUAL -
After pressing the "Test" button, all TabPanes are not eligible for garbage collection. If you comment line X then everything works as expected.

---------- BEGIN SOURCE ----------
public class Test1 extends Application {

    private final List<Tab> tabs = new ArrayList<>();

    @Override
    public void start(Stage stage) {
        VBox root = new VBox();

        var button = new Button("Test");
        button.setOnAction(e -> {
            for (var tab : tabs) {
                var tabPane = tab.getTabPane();
                tabPane.getTabs().clear();
                root.getChildren().remove(tabPane);
            }
        });
        root.getChildren().add(button);

        for (var i = 0; i < 10; i++) {
            var tab = new Tab("Tab: " + i);
            tab.setGraphic(new HBox(new Label("#"))); // LINE X
            tabs.add(tab);
            var tabPane = new TabPane(tab);
            root.getChildren().add(tabPane);
        }

        Scene scene = new Scene(root, 400, 600);

        stage.setScene(scene);
        stage.setTitle("StackPane Size Test");
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }
}
---------- END SOURCE ----------