diff --git a/gateway/platforms/feishu.py b/gateway/platforms/feishu.py
index 718f01e9954d..f659f6197843 100644
--- a/gateway/platforms/feishu.py
+++ b/gateway/platforms/feishu.py
@@ -2390,8 +2390,7 @@ async def _handle_reaction_event(self, event_type: str, data: Any) -> None:
             if not msg:
                 return
             sender = getattr(msg, "sender", None)
-            sender_type = str(getattr(sender, "sender_type", "") or "").lower()
-            if sender_type != "app":
+            if not self._is_own_bot_sender(sender):
                 return  # only route reactions on our own bot messages
             chat_id = str(getattr(msg, "chat_id", "") or "")
             chat_type_raw = str(getattr(msg, "chat_type", "p2p") or "p2p")
@@ -3647,6 +3646,10 @@ def _should_accept_group_message(self, message: Any, sender_id: Any, chat_id: st
     def _is_self_sent_bot_message(self, event: Any) -> bool:
         """Return True only for Feishu events emitted by this Hermes bot."""
         sender = getattr(event, "sender", None)
+        return self._is_own_bot_sender(sender)
+
+    def _is_own_bot_sender(self, sender: Any) -> bool:
+        """Return True only for senders that match this Hermes bot identity."""
         sender_type = str(getattr(sender, "sender_type", "") or "").strip().lower()
         if sender_type not in {"bot", "app"}:
             return False
diff --git a/tests/gateway/test_feishu.py b/tests/gateway/test_feishu.py
index f21b7dcef829..8f978ea0d265 100644
--- a/tests/gateway/test_feishu.py
+++ b/tests/gateway/test_feishu.py
@@ -689,6 +689,104 @@ def _close_coro_and_return_future(coro, _loop):
             adapter._on_reaction_event("im.message.reaction.created_v1", data)
         run_threadsafe.assert_called_once()
 
+    @patch.dict(
+        os.environ,
+        {
+            "FEISHU_BOT_OPEN_ID": "ou_hermes",
+            "FEISHU_BOT_USER_ID": "u_hermes",
+        },
+        clear=True,
+    )
+    def test_user_reaction_on_other_app_message_is_dropped(self):
+        from gateway.config import PlatformConfig
+        from gateway.platforms.feishu import FeishuAdapter
+
+        adapter = FeishuAdapter(PlatformConfig())
+        adapter._client = Mock()
+        adapter._client.im.v1.message.get = Mock()
+        adapter._build_get_message_request = Mock(return_value=object())
+        adapter._handle_message_with_guards = AsyncMock()
+
+        target_message = SimpleNamespace(
+            sender=SimpleNamespace(
+                sender_type="app",
+                sender_id=SimpleNamespace(open_id="ou_other_bot", user_id="u_other_bot"),
+            ),
+            chat_id="oc_group",
+            chat_type="group",
+        )
+        response = Mock()
+        response.success = Mock(return_value=True)
+        response.data = SimpleNamespace(items=[target_message])
+        adapter._client.im.v1.message.get.return_value = response
+
+        data = SimpleNamespace(
+            event=SimpleNamespace(
+                message_id="om_other_bot",
+                user_id=SimpleNamespace(open_id="ou_user", user_id="u_user", union_id="on_user"),
+                reaction_type=SimpleNamespace(emoji_type="THUMBSUP"),
+            )
+        )
+
+        asyncio.run(adapter._handle_reaction_event("im.message.reaction.created_v1", data))
+
+        adapter._handle_message_with_guards.assert_not_awaited()
+
+    @patch.dict(
+        os.environ,
+        {
+            "FEISHU_BOT_OPEN_ID": "ou_hermes",
+            "FEISHU_BOT_USER_ID": "u_hermes",
+        },
+        clear=True,
+    )
+    def test_user_reaction_on_own_app_message_is_routed(self):
+        from gateway.config import PlatformConfig
+        from gateway.platforms.feishu import FeishuAdapter
+
+        adapter = FeishuAdapter(PlatformConfig())
+        adapter._client = Mock()
+        adapter._client.im.v1.message.get = Mock()
+        adapter._build_get_message_request = Mock(return_value=object())
+        adapter._handle_message_with_guards = AsyncMock()
+        adapter._resolve_sender_profile = AsyncMock(
+            return_value={
+                "user_id": "u_user",
+                "user_name": "Feishu User",
+                "user_id_alt": "on_user",
+            }
+        )
+        adapter.get_chat_info = AsyncMock(return_value={"name": "Feishu Group", "type": "group"})
+
+        target_message = SimpleNamespace(
+            sender=SimpleNamespace(
+                sender_type="app",
+                sender_id=SimpleNamespace(open_id="ou_hermes", user_id="u_hermes"),
+            ),
+            chat_id="oc_group",
+            chat_type="group",
+        )
+        response = Mock()
+        response.success = Mock(return_value=True)
+        response.data = SimpleNamespace(items=[target_message])
+        adapter._client.im.v1.message.get.return_value = response
+
+        data = SimpleNamespace(
+            event=SimpleNamespace(
+                message_id="om_hermes",
+                user_id=SimpleNamespace(open_id="ou_user", user_id="u_user", union_id="on_user"),
+                reaction_type=SimpleNamespace(emoji_type="THUMBSUP"),
+            )
+        )
+
+        asyncio.run(adapter._handle_reaction_event("im.message.reaction.created_v1", data))
+
+        adapter._handle_message_with_guards.assert_awaited_once()
+        event = adapter._handle_message_with_guards.await_args.args[0]
+        self.assertEqual(event.text, "reaction:added:THUMBSUP")
+        self.assertEqual(event.source.chat_id, "oc_group")
+        self.assertEqual(event.source.user_id, "u_user")
+
     @patch.dict(os.environ, {"FEISHU_GROUP_POLICY": "open"}, clear=True)
     def test_group_message_requires_mentions_even_when_policy_open(self):
         from gateway.config import PlatformConfig