To reproduce the bug right click the scroll bar. You'll see that content is scrolled.


import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeView;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class BugTreeViewRightCilck extends Application {

    TreeView testedControl;

    @Override
    public void start(Stage stage) {

        testedControl = new TreeView();
        testedControl.setMaxHeight(150d);
        testedControl.setPrefHeight(150d);
        
        TreeItem rootItem = new TreeItem("Root");
        rootItem.setExpanded(true);
        testedControl.setRoot(rootItem);
        
        for (int i = 0; i < 10; i++) {
            TreeItem item = new TreeItem("item - " + i);
            item.setExpanded(true);
            rootItem.getChildren().add(item);
            
            for (int j = 0; j < 10; j++) {
                item.getChildren().add(new TreeItem("item - " + i + " - " + j));
            }
        }
        
        HBox root = new HBox(20d);
        root.getChildren().add(testedControl);

        Scene scene = new Scene(root, 300, 250);

        stage.setScene(scene);
        stage.setTitle(System.getProperty("java.runtime.version") + "; " + System.getProperty("javafx.runtime.version"));
        stage.show();
    }

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

}