diff --git a/invesalius/data/viewer_volume.py b/invesalius/data/viewer_volume.py
index dfd3602..067ba85 100755
--- a/invesalius/data/viewer_volume.py
+++ b/invesalius/data/viewer_volume.py
@@ -403,8 +403,9 @@ class Viewer(wx.Panel):
 
         self.ren.AddActor(self.staticballs[self.ball_id])
         self.ball_id = self.ball_id + 1
-        self.UpdateRender()
-
+        #self.UpdateRender()
+        self.Refresh()
+        
     def HideAllMarkers(self, pubsub_evt):
         ballid = pubsub_evt.data
         for i in range(0, ballid):
diff --git a/invesalius/gui/task_navigator.py b/invesalius/gui/task_navigator.py
index c0ca456..b234d1a 100644
--- a/invesalius/gui/task_navigator.py
+++ b/invesalius/gui/task_navigator.py
@@ -107,6 +107,7 @@ class InnerFoldPanel(wx.Panel):
         default_colour = wx.SystemSettings_GetColour(wx.SYS_COLOUR_MENUBAR)
         self.SetBackgroundColour(default_colour)
 
+        self.__bind_events()
         # Fold panel and its style settings
         # FIXME: If we dont insert a value in size or if we set wx.DefaultSize,
         # the fold_panel doesnt show. This means that, for some reason, Sizer
@@ -154,6 +155,7 @@ class InnerFoldPanel(wx.Panel):
         checktrigger.SetToolTip(tooltip)
         checktrigger.SetValue(False)
         checktrigger.Bind(wx.EVT_CHECKBOX, partial(self.UpdateExternalTrigger, ctrl=checktrigger))
+        self.checktrigger = checktrigger
 
         if sys.platform != 'win32':
             checkcamera.SetWindowVariant(wx.WINDOW_VARIANT_SMALL)
@@ -173,6 +175,16 @@ class InnerFoldPanel(wx.Panel):
         self.SetSizer(sizer)
         self.Update()
         self.SetAutoLayout(1)
+        
+    def __bind_events(self):
+        Publisher.subscribe(self.OnTrigger, 'Navigation Status')
+
+    def OnTrigger(self, pubsub_evt):
+        status = pubsub_evt.data
+        if status:
+            self.checktrigger.Enable(False)
+        else:
+            self.checktrigger.Enable(True)
 
     def UpdateExternalTrigger(self, evt, ctrl):
         Publisher.sendMessage('Update trigger state', ctrl.GetValue())
--
libgit2 0.21.2