diff --git a/panel/components/inspected-app/inspected-app.js b/panel/components/inspected-app/inspected-app.js
index 0b49106..fc39256 100644
--- a/panel/components/inspected-app/inspected-app.js
+++ b/panel/components/inspected-app/inspected-app.js
@@ -64,19 +64,21 @@ function inspectedAppService($rootScope) {
   function onHintMessage(hint) {
     if (hint.message) {
       hints.push(hint);
-    } else if (hint.event === 'model:change') {
-      scopes[hint.id].models[hint.path] = (typeof hint.value === 'undefined') ?
-                                            undefined : JSON.parse(hint.value);
-    } else if (hint.event === 'scope:new') {
-      addNewScope(hint);
-    } else if (hint.event === 'scope:link') {
-      scopes[hint.id].descriptor = hint.descriptor;
-    }
-
-    if (hint.event) {
+    } else if (hint.event) {
+      if (hint.id) {
+        if (hint.event === 'scope:new') {
+          addNewScope(hint);
+        } else if (scopes[hint.id]) {
+          if (hint.event === 'model:change') {
+            scopes[hint.id].models[hint.path] = (typeof hint.value === 'undefined') ?
+                                                  undefined : JSON.parse(hint.value);
+          } else if (hint.event === 'scope:link') {
+            scopes[hint.id].descriptor = hint.descriptor;
+          }
+        }
+      }
       $rootScope.$broadcast(hint.event, hint);
     }
-
   }
 
   function onRefreshMessage() {