diff --git a/backend/app/channels/feishu.py b/backend/app/channels/feishu.py
index 094d24f58..1a2321eb7 100644
--- a/backend/app/channels/feishu.py
+++ b/backend/app/channels/feishu.py
@@ -88,6 +88,12 @@ class FeishuChannel(Channel):
     def supports_streaming(self) -> bool:
         return True
 
+    @property
+    def is_running(self) -> bool:
+        if not self._running:
+            return False
+        return self._thread is not None and self._thread.is_alive()
+
     async def start(self) -> None:
         if self._running:
             return
@@ -193,6 +199,7 @@ class FeishuChannel(Channel):
         except Exception:
             if self._running:
                 logger.exception("Feishu WebSocket error")
+            self._running = False
 
     async def stop(self) -> None:
         self._running = False
diff --git a/backend/app/gateway/routers/channel_connections.py b/backend/app/gateway/routers/channel_connections.py
index 260a94b5d..50f2f8d76 100644
--- a/backend/app/gateway/routers/channel_connections.py
+++ b/backend/app/gateway/routers/channel_connections.py
@@ -214,6 +214,36 @@ def _runtime_unavailable_reason(provider: str) -> str:
     return f"Enter the required {display_name} credentials to connect this channel."
 
 
+def _runtime_not_running_reason(provider: str) -> str:
+    meta = _PROVIDER_META.get(provider)
+    display_name = meta["display_name"] if meta else provider
+    return f"{display_name} channel is configured but is not running. Check the credentials and save this channel again."
+
+
+def _runtime_channel_running(provider: str) -> bool | None:
+    try:
+        from app.channels.service import get_channel_service
+    except Exception:
+        logger.debug("Unable to inspect channel service status", exc_info=True)
+        return None
+
+    service = get_channel_service()
+    if service is None:
+        return None
+    try:
+        status = service.get_status()
+    except Exception:
+        logger.debug("Unable to read channel service status", exc_info=True)
+        return None
+
+    if not status.get("service_running"):
+        return False
+    channel_status = status.get("channels", {}).get(provider)
+    if not isinstance(channel_status, dict):
+        return None
+    return bool(channel_status.get("running"))
+
+
 def _provider_unavailable_reason(
     config: ChannelConnectionsConfig,
     channels_config: dict[str, Any],
@@ -226,6 +256,8 @@ def _provider_unavailable_reason(
         return _runtime_unavailable_reason(provider)
     if not _runtime_channel_configured(provider, channels_config):
         return _runtime_unavailable_reason(provider)
+    if _runtime_channel_running(provider) is False:
+        return _runtime_not_running_reason(provider)
     return None
 
 
diff --git a/backend/tests/test_channel_connections_router.py b/backend/tests/test_channel_connections_router.py
index 23ff0afd9..305f7bdea 100644
--- a/backend/tests/test_channel_connections_router.py
+++ b/backend/tests/test_channel_connections_router.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+from types import SimpleNamespace
 from uuid import UUID
 
 from _router_auth_helpers import make_authed_test_app
@@ -201,6 +202,37 @@ def test_get_providers_reports_unconfigured_when_runtime_channel_is_missing(tmp_
     anyio.run(repo.close)
 
 
+def test_get_providers_reports_configured_channel_not_running(tmp_path, monkeypatch):
+    import anyio
+
+    repo = anyio.run(_make_repo, tmp_path)
+    app = _make_app(_enabled_connections_config(), repo, _channels_config())
+    service = SimpleNamespace(
+        get_status=lambda: {
+            "service_running": True,
+            "channels": {
+                "feishu": {
+                    "enabled": True,
+                    "running": False,
+                }
+            },
+        }
+    )
+    monkeypatch.setattr("app.channels.service.get_channel_service", lambda: service)
+
+    with TestClient(app) as client:
+        response = client.get("/api/channels/providers")
+
+    assert response.status_code == 200
+    by_provider = {item["provider"]: item for item in response.json()["providers"]}
+    assert by_provider["feishu"]["configured"] is True
+    assert by_provider["feishu"]["connectable"] is False
+    assert by_provider["feishu"]["connection_status"] == "not_connected"
+    assert "configured but is not running" in by_provider["feishu"]["unavailable_reason"]
+
+    anyio.run(repo.close)
+
+
 def test_get_providers_uses_newest_connection_status_per_provider(tmp_path):
     import anyio
 
diff --git a/backend/tests/test_feishu_parser.py b/backend/tests/test_feishu_parser.py
index 5ecfb9e0b..da9f780ac 100644
--- a/backend/tests/test_feishu_parser.py
+++ b/backend/tests/test_feishu_parser.py
@@ -73,6 +73,16 @@ def test_feishu_on_message_plain_text():
         assert mock_make_inbound.call_args[1]["text"] == "Hello world"
 
 
+def test_feishu_is_not_running_when_ws_thread_exits():
+    bus = MessageBus()
+    channel = FeishuChannel(bus, {"app_id": "test", "app_secret": "test"})
+    channel._running = True
+    channel._thread = MagicMock()
+    channel._thread.is_alive.return_value = False
+
+    assert channel.is_running is False
+
+
 def test_feishu_on_message_rich_text():
     bus = MessageBus()
     config = {"app_id": "test", "app_secret": "test"}