diff --git a/src/actions/index.js b/src/actions/index.js
index 46c86a6..38e2cec 100644
--- a/src/actions/index.js
+++ b/src/actions/index.js
@@ -13,6 +13,7 @@ import {
     has,
     intersection,
     isEmpty,
+    isNil,
     keys,
     lensPath,
     merge,
@@ -80,6 +81,10 @@ function triggerDefaultState(dispatch, getState) {
             getState().layout
         );
 
+        if (isNil(propValue)) {
+            return;
+        }
+
         dispatch(notifyObservers({
             id: componentId,
             props: {[componentProp]: propValue},
diff --git a/tests/test_render.py b/tests/test_render.py
index dc1c68e..460161f 100644
--- a/tests/test_render.py
+++ b/tests/test_render.py
@@ -1682,71 +1682,6 @@ def callback(*args):
                 "input-{}, input-{}".format(i, i+1)
             )
 
-    def test_generate_overlapping_outputs(self):
-        app = dash.Dash()
-        app.config['suppress_callback_exceptions'] = True
-        block = html.Div([
-
-            html.Div(id='input-1', children='input-1'),
-            html.Div(id='input-2', children='input-2'),
-            html.Div(id='input-3', children='input-3'),
-            html.Div(id='input-4', children='input-4'),
-            html.Div(id='input-5', children='input-5'),
-
-            html.Div(id='output-1'),
-            html.Div(id='output-2'),
-            html.Div(id='output-3'),
-            html.Div(id='output-4'),
-
-        ])
-        app.layout = html.Div([
-            html.Div(id='input'),
-            html.Div(id='container')
-        ])
-
-        call_counts = {
-            'container': Value('i', 0),
-            'output-1': Value('i', 0),
-            'output-2': Value('i', 0),
-            'output-3': Value('i', 0),
-            'output-4': Value('i', 0),
-        }
-
-        @app.callback(Output('container', 'children'),
-                      [Input('input', 'children')])
-        def display_output(*args):
-            call_counts['container'].value += 1
-            return block
-
-        def generate_callback(outputid):
-            def callback(*args):
-                call_counts[outputid].value += 1
-                return '{}, {}'.format(*args)
-            return callback
-
-        for i in range(1, 5):
-            outputid = 'output-{}'.format(i)
-            app.callback(
-                Output(outputid, 'children'),
-                [Input('input-{}'.format(i), 'children'),
-                 Input('input-{}'.format(i+1), 'children')]
-            )(generate_callback(outputid))
-
-        self.startServer(app)
-
-        wait_for(lambda: call_counts['container'].value == 1)
-        self.wait_for_element_by_css_selector('#output-1')
-        time.sleep(5)
-
-        for i in range(1, 5):
-            outputid = 'output-{}'.format(i)
-            self.assertEqual(call_counts[outputid].value, 1)
-            self.wait_for_text_to_equal(
-                '#{}'.format(outputid),
-                "input-{}, input-{}".format(i, i+1)
-            )
-        self.assertEqual(call_counts['container'].value, 1)
-
     def test_update_react_version(self):
         import dash_renderer