diff --git a/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/ComboBoxListViewSkin.java b/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/ComboBoxListViewSkin.java
--- a/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/ComboBoxListViewSkin.java
+++ b/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/ComboBoxListViewSkin.java
@@ -300,6 +300,8 @@
         };
     }
     
+    private boolean listSelectionLock = false;
+    
     private ListView<T> createListView() {
         final ListView<T> listView = new ListView<T>() {
             
@@ -352,10 +354,21 @@
         listView.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
 
         listView.getSelectionModel().selectedIndexProperty().addListener(new InvalidationListener() {
+             @Override public void invalidated(Observable o) {
+                if (listSelectionLock) return;
+                 int index = listView.getSelectionModel().getSelectedIndex();
+                 comboBox.getSelectionModel().select(index);
+                 updateDisplayNode();
+             }
+         });
+         
+        comboBox.getSelectionModel().selectedItemProperty().addListener(new InvalidationListener() {
             @Override public void invalidated(Observable o) {
-                int index = listView.getSelectionModel().getSelectedIndex();
-                comboBox.getSelectionModel().select(index);
-                updateDisplayNode();
+                T item = comboBox.getSelectionModel().getSelectedItem();
+                listSelectionLock = true;
+                listView.getSelectionModel().clearSelection();
+                listView.getSelectionModel().select(item);
+                listSelectionLock = false;
             }
         });
         
diff --git a/javafx-ui-controls/test/javafx/scene/control/ComboBoxTest.java b/javafx-ui-controls/test/javafx/scene/control/ComboBoxTest.java
--- a/javafx-ui-controls/test/javafx/scene/control/ComboBoxTest.java
+++ b/javafx-ui-controls/test/javafx/scene/control/ComboBoxTest.java
@@ -806,4 +806,32 @@
         System.out.println("cell: " + cell);
         assertEquals("TO_STRING", cell.getText());
     } 
+    
+    @Test public void test_rt20189() {
+        comboBox.getItems().addAll("0","1","2","3","4","5","6","7","8","9");
+        
+        Stage stage = new Stage();
+        Scene scene = new Scene(comboBox);
+        stage.setScene(scene);
+        comboBox.impl_processCSS(true);
+        comboBox.show();
+        
+        ListView listView = ((ComboBoxListViewSkin)comboBox.getSkin()).getListView();
+        SelectionModel sm = listView.getSelectionModel();
+        
+        comboBox.getSelectionModel().select(2);
+        Object item = sm.getSelectedItem();
+        assertEquals("2", item);
+        assertEquals(2, sm.getSelectedIndex());
+        
+        comboBox.setValue("test");
+        item = sm.getSelectedItem();
+        assertEquals("test",item);
+        assertEquals(-1, sm.getSelectedIndex());
+        
+        comboBox.getSelectionModel().select(2);
+        item = sm.getSelectedItem();
+        assertEquals("2", item);
+        assertEquals(2, sm.getSelectedIndex());
+    }
 }