diff --git a/models/controlled-documents/src/index.ts b/models/controlled-documents/src/index.ts
index d57b95d36a..c7241e5594 100644
--- a/models/controlled-documents/src/index.ts
+++ b/models/controlled-documents/src/index.ts
@@ -1069,6 +1069,11 @@ export function createModel (builder: Builder): void {
 export function defineNotifications (builder: Builder): void {
   builder.mixin(documents.class.ControlledDocument, core.class.Class, activity.mixin.ActivityDoc, {})
 
+  builder.createDoc(activity.class.ActivityExtension, core.space.Model, {
+    ofClass: documents.class.ControlledDocument,
+    components: { input: { component: chunter.component.ChatMessageInput } }
+  })
+
   builder.createDoc(activity.class.ActivityExtension, core.space.Model, {
     ofClass: documents.class.DocumentComment,
     components: { input: { component: chunter.component.ChatMessageInput } }
diff --git a/plugins/controlled-documents-resources/src/components/document/EditDocContent.svelte b/plugins/controlled-documents-resources/src/components/document/EditDocContent.svelte
index ec99525af6..3d57f20730 100644
--- a/plugins/controlled-documents-resources/src/components/document/EditDocContent.svelte
+++ b/plugins/controlled-documents-resources/src/components/document/EditDocContent.svelte
@@ -286,8 +286,9 @@
               props={{
                 object: $controlledDocument,
                 showCommenInput: true,
-                boundary,
-                focusIndex: 1000
+                boundary: boundary ?? undefined,
+                focusIndex: 1000,
+                shouldScroll: false
               }}
             />
           </div>