FULL PRODUCT VERSION :
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)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
To reproduce just launch class below and collapse root tree - you will see that child treeItem graphics are still visible.



REGRESSION. Last worked in version 8u91

ADDITIONAL REGRESSION INFORMATION:
java version "1.8.0_91"
Java(TM) SE Runtime Environment (build 1.8.0_91-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.91-b14, mixed mode)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
When you collapse root tree - you should not see graphics that left from child treeItems
ACTUAL -
When you collapse root tree - you can see graphics that left from child treeItems

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.util.Collection;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import javafx.application.Application;
import javafx.beans.property.ReadOnlyStringWrapper;
import javafx.scene.Scene;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeTableColumn;
import javafx.scene.control.TreeTableView;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;

public class Test extends Application {

public void start(Stage pStage) {
pStage.setTitle("Test");

// create tree items
final TreeItem<String> root = new TreeItem<>("Root Node");
root.setExpanded(true);

final Collection<TreeItem<String>> children = IntStream.rangeClosed(1, 5)
.mapToObj(pIdx ->new TreeItem<>("Child Node " + pIdx, new Rectangle(10, 10)))
.collect(Collectors.toList());

root.getChildren().addAll(children);

// create TreeTableView
final TreeTableView<String> treeTableView = new TreeTableView<>(root);
final TreeTableColumn<String,String> column = new TreeTableColumn<>("Column");
column.setCellValueFactory(
pTreeItem -> new ReadOnlyStringWrapper(pTreeItem.getValue().getValue()));
treeTableView.getColumns().add(column);

pStage.setScene(new Scene(treeTableView, 300, 450));
pStage.show();
}

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