diff --git a/aiograpi/realtime/fbns.py b/aiograpi/realtime/fbns.py
index 9fdac3e4..26b81774 100644
--- a/aiograpi/realtime/fbns.py
+++ b/aiograpi/realtime/fbns.py
@@ -314,6 +314,8 @@ async def _send(self, packet: bytes) -> None:
     async def _recv_packet(self) -> bytes:
         try:
             return await asyncio.to_thread(self.transport.recv_packet)
+        except TimeoutError:
+            raise
         except Exception:
             self.connected = False
             raise
diff --git a/tests/regression/test_fbns.py b/tests/regression/test_fbns.py
index eda5be34..739c4243 100644
--- a/tests/regression/test_fbns.py
+++ b/tests/regression/test_fbns.py
@@ -249,6 +249,18 @@ async def test_fbns_read_once_marks_client_disconnected_when_socket_closes(self)
 
         self.assertFalse(fbns.connected)
 
+    async def test_fbns_read_once_keeps_client_connected_on_socket_timeout(self):
+        client = _build_logged_in_client()
+        transport = mock.Mock()
+        transport.recv_packet.side_effect = TimeoutError("timed out")
+        fbns = FbnsClient(client, transport=transport)
+        fbns.connected = True
+
+        with self.assertRaises(TimeoutError):
+            await fbns.read_once()
+
+        self.assertTrue(fbns.connected)
+
     async def test_fbns_disconnect_clears_client_state_after_broken_socket(self):
         client = _build_logged_in_client()
         transport = mock.Mock()