diff --git a/backend/communications/api/viewsets.py b/backend/communications/api/viewsets.py
index 4ed16e03..24a21c35 100644
--- a/backend/communications/api/viewsets.py
+++ b/backend/communications/api/viewsets.py
@@ -815,7 +815,10 @@ class ChatViewSet(viewsets.ModelViewSet):
         # Если все еще нет around_id - возвращаем последние сообщения
         if not around_id:
             fallback_limit = before_limit + after_limit
-            messages = list(queryset.order_by('-created_at')[:fallback_limit])
+            messages = list(queryset.order_by('-created_at', '-id')[:fallback_limit + 1])
+            has_more_before = len(messages) > fallback_limit
+            if has_more_before:
+                messages = messages[:fallback_limit]
             messages.reverse()
 
             # Автоотметка: последнее ЗАГРУЖЕННОЕ становится last_read
@@ -827,7 +830,9 @@ class ChatViewSet(viewsets.ModelViewSet):
                 'messages': [serialize_message(m) for m in messages],
                 'messages_count': len(messages),
                 'anchor_id': None,
-                'anchor_index': 0
+                'anchor_index': 0,
+                'has_more_before': has_more_before,
+                'has_more_after': False,
             })
 
         # Определяем, это ID сообщения или timestamp
@@ -872,7 +877,10 @@ class ChatViewSet(viewsets.ModelViewSet):
         if not anchor_msg:
             # Если не найдено - возвращаем последние сообщения
             fallback_limit = before_limit + after_limit
-            messages = list(queryset.order_by('-created_at')[:fallback_limit])
+            messages = list(queryset.order_by('-created_at', '-id')[:fallback_limit + 1])
+            has_more_before = len(messages) > fallback_limit
+            if has_more_before:
+                messages = messages[:fallback_limit]
             messages.reverse()
 
             # Автоотметка: последнее ЗАГРУЖЕННОЕ становится last_read
@@ -884,7 +892,9 @@ class ChatViewSet(viewsets.ModelViewSet):
                 'messages': [serialize_message(m) for m in messages],
                 'messages_count': len(messages),
                 'anchor_id': None,
-                'anchor_index': 0
+                'anchor_index': 0,
+                'has_more_before': has_more_before,
+                'has_more_after': False,
             })
 
         # Асимметричная загрузка: больше контекста, меньше новых
diff --git a/backend/tests/api/v1/communications/test_communications_api.py b/backend/tests/api/v1/communications/test_communications_api.py
index cf4dc03f..e3051087 100644
--- a/backend/tests/api/v1/communications/test_communications_api.py
+++ b/backend/tests/api/v1/communications/test_communications_api.py
@@ -286,6 +286,36 @@ class TestChatViewSet:
         assert "messages" in response.data
         assert response.data["messages_count"] > 0
 
+    def test_messages_around_without_anchor_reports_more_older(
+        self, auth_client, private_chat, user1
+    ):
+        """Fallback messages-around без якоря должен сообщать, что вверх есть история."""
+        for i in range(40):
+            Message.objects.create(chat=private_chat, author=user1, content=f"Msg {i}")
+
+        url = f"/api/v1/communications/chats/{private_chat.pk}/messages-around/"
+        response = auth_client.get(url, {"limit": 30})
+
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["messages_count"] == 30
+        assert response.data["has_more_before"] is True
+        assert response.data["has_more_after"] is False
+
+    def test_messages_around_with_missing_anchor_reports_more_older(
+        self, auth_client, private_chat, user1
+    ):
+        """Fallback messages-around с отсутствующим around_id не должен скрывать старую историю."""
+        for i in range(40):
+            Message.objects.create(chat=private_chat, author=user1, content=f"Msg {i}")
+
+        url = f"/api/v1/communications/chats/{private_chat.pk}/messages-around/"
+        response = auth_client.get(url, {"around_id": 999999, "limit": 30})
+
+        assert response.status_code == status.HTTP_200_OK
+        assert response.data["messages_count"] == 30
+        assert response.data["has_more_before"] is True
+        assert response.data["has_more_after"] is False
+
     def test_messages_pagination_before(self, auth_client, private_chat, user1):
         """Пагинация сообщений (before)"""
         messages = [
diff --git a/frontend/src/app/messages/[chatId]/page.tsx b/frontend/src/app/messages/[chatId]/page.tsx
index 573b92da..3a3e050c 100644
--- a/frontend/src/app/messages/[chatId]/page.tsx
+++ b/frontend/src/app/messages/[chatId]/page.tsx
@@ -441,6 +441,47 @@ function MessageDialogPageContent() {
     return () => viewport.removeEventListener("scroll", onScroll);
   }, [cm, markRead, scroll]);
 
+  useEffect(() => {
+    if (cm.messagesLoading || cm.loadingOlder || displayMessages.length === 0) {
+      return;
+    }
+
+    if (!cm.hasMoreOlder && !cm.allowOneOlderProbe) {
+      return;
+    }
+
+    const component = messagesViewportRef.current;
+    const viewport = component?.containerRef?.current;
+    if (!viewport) {
+      return;
+    }
+
+    let cancelled = false;
+
+    const frameId = window.requestAnimationFrame(() => {
+      if (cancelled) {
+        return;
+      }
+
+      const hasScrollableOverflow = viewport.scrollHeight > viewport.clientHeight + 8;
+      if (!hasScrollableOverflow) {
+        void cm.loadOlderMessages();
+      }
+    });
+
+    return () => {
+      cancelled = true;
+      window.cancelAnimationFrame(frameId);
+    };
+  }, [
+    cm.allowOneOlderProbe,
+    cm.hasMoreOlder,
+    cm.loadingOlder,
+    cm.loadOlderMessages,
+    cm.messagesLoading,
+    displayMessages.length,
+  ]);
+
   /* ── fallback sync ── */
   useChatFallbackSync({
     chatId: chatId || null,