FULL PRODUCT VERSION :
Windows:
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) Client VM (build 25.92-b14, mixed mode)

Linux 1:
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)

Linux 2:
openjdk version "1.8.0_92"
OpenJDK Runtime Environment (build 1.8.0_92-b14)
OpenJDK 64-Bit Server VM (build 25.92-b14, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux [redacted] 4.5.1-1-ARCH #1 SMP PREEMPT Thu Apr 14 19:19:32 CEST 2016 x86_64 GNU/Linux
Microsoft Windows [Version 6.1.7601]


A DESCRIPTION OF THE PROBLEM :
I have a TreeTableView where every node has an icon. Everything works perfectly when I expand the tree, but when I collapse the tree, the icons of the no longer visible items are left behind.

The rows and the text are removed, but the icons remain "free-floating". In the screenshot you can see the TreeTableView twice, once expanded with the correct text, and once collapsed with only the remaining icons.

Please see http://stackoverflow.com/questions/36917220/javafx-treetableview-leaves-icons-behind-when-collapsing for screenshots and sample code.

This code was adapted from Oracle documentation on TreeTableView at https://docs.oracle.com/javase/8/javafx/user-interface-tutorial/tree-table-view.htm

REGRESSION. Last worked in version 8u73

ADDITIONAL REGRESSION INFORMATION:
A user on Stackoverflow reported that the sample code works on 1.8.0_71.

Please see http://stackoverflow.com/questions/36917220/javafx-treetableview-leaves-icons-behind-when-collapsing for more information

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Please see http://stackoverflow.com/questions/36917220/javafx-treetableview-leaves-icons-behind-when-collapsing for sample code

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I expected the icons to not be displayed anymore
ACTUAL -
The icons were still present, although the rest of the cells was removed

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javafx.application.Application;
import javafx.beans.property.ReadOnlyStringWrapper;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.TreeTableColumn;
import javafx.scene.control.TreeTableColumn.CellDataFeatures;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeTableView;
import javafx.stage.Stage;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;

public class TreeTableViewSample extends Application {
    private static final Image icon = new Image(TreeTableViewSample.class.getResourceAsStream("icon.png"));

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

    @Override
    public void start(Stage stage) {
        stage.setTitle("Tree Table View Samples");
        final Scene scene = new Scene(new Group(), 200, 400);
        Group sceneRoot = (Group)scene.getRoot();

        //Creating tree items
        final TreeItem<String> childNode1 = new TreeItem<>("Child Node 1", new ImageView(icon));
        final TreeItem<String> childNode2 = new TreeItem<>("Child Node 2", new ImageView(icon));
        final TreeItem<String> childNode3 = new TreeItem<>("Child Node 3", new ImageView(icon));

        //Creating the root element
        final TreeItem<String> root = new TreeItem<>("Root node", new ImageView(icon));
        root.setExpanded(true);

        //Adding tree items to the root
        root.getChildren().setAll(childNode1, childNode2, childNode3);

        //Creating a column
        TreeTableColumn<String,String> column = new TreeTableColumn<>("Column");
        column.setPrefWidth(150);

        //Defining cell content
        column.setCellValueFactory((CellDataFeatures<String, String> p) ->
            new ReadOnlyStringWrapper(p.getValue().getValue()));

        //Creating a tree table view
        final TreeTableView<String> treeTableView = new TreeTableView<>(root);
        treeTableView.getColumns().add(column);
        treeTableView.setPrefWidth(152);
        treeTableView.setShowRoot(true);
        sceneRoot.getChildren().add(treeTableView);
        stage.setScene(scene);
        stage.show();
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
When the icon is set using a CellFactory, collapsing works as expected.