diff --git a/coretk/coretk/dialogs/wlanconfig.py b/coretk/coretk/dialogs/wlanconfig.py
index aed411b8..20966d2b 100644
--- a/coretk/coretk/dialogs/wlanconfig.py
+++ b/coretk/coretk/dialogs/wlanconfig.py
@@ -58,6 +58,9 @@ class WlanConfigDialog(Dialog):
 
         :return: nothing
         """
-        self.config_frame.parse_config()
+        config = self.config_frame.parse_config()
         self.app.core.wlan_configs[self.node.id] = self.config
+        if self.app.core.is_runtime():
+            session_id = self.app.core.session_id
+            self.app.core.client.set_wlan_config(session_id, self.node.id, config)
         self.destroy()
diff --git a/coretk/coretk/graph/graph.py b/coretk/coretk/graph/graph.py
index a2d82dc4..acce0e28 100644
--- a/coretk/coretk/graph/graph.py
+++ b/coretk/coretk/graph/graph.py
@@ -87,6 +87,9 @@ class CanvasGraph(tk.Canvas):
         :param core.api.grpc.core_pb2.Session session: session to draw
         :return: nothing
         """
+        # hide context
+        self.hide_context()
+
         # delete any existing drawn items
         for tag in tags.COMPONENT_TAGS:
             self.delete(tag)
@@ -122,6 +125,11 @@ class CanvasGraph(tk.Canvas):
         self.bind("<ButtonPress-3>", lambda e: self.scan_mark(e.x, e.y))
         self.bind("<B3-Motion>", lambda e: self.scan_dragto(e.x, e.y, gain=1))
 
+    def hide_context(self):
+        if self.context:
+            self.context.unpost()
+            self.context = None
+
     def get_actual_coords(self, x, y):
         actual_x = (x - self.offset[0]) / self.ratio
         actual_y = (y - self.offset[1]) / self.ratio
@@ -294,8 +302,7 @@ class CanvasGraph(tk.Canvas):
             return
 
         if self.context:
-            self.context.unpost()
-            self.context = None
+            self.hide_context()
         else:
             if self.mode == GraphMode.ANNOTATION:
                 self.focus_set()
@@ -592,8 +599,7 @@ class CanvasGraph(tk.Canvas):
                 self.context = canvas_node.create_context()
                 self.context.post(event.x_root, event.y_root)
         else:
-            self.context.unpost()
-            self.context = None
+            self.hide_context()
 
     def press_delete(self, event):
         """
diff --git a/coretk/coretk/toolbar.py b/coretk/coretk/toolbar.py
index df183494..323c5d67 100644
--- a/coretk/coretk/toolbar.py
+++ b/coretk/coretk/toolbar.py
@@ -222,6 +222,7 @@ class Toolbar(ttk.Frame):
 
         :return: nothing
         """
+        self.app.canvas.hide_context()
         self.app.statusbar.core_alarms.clear()
         self.app.statusbar.progress_bar.start(5)
         self.app.canvas.mode = GraphMode.SELECT
@@ -385,6 +386,7 @@ class Toolbar(ttk.Frame):
 
         :return: nothing
         """
+        self.app.canvas.hide_context()
         self.app.statusbar.progress_bar.start(5)
         thread = threading.Thread(target=self.app.core.stop_session)
         thread.start()