fix: update mesh offline state (#1579)

custom_components/xiaomi_home/miot/miot_client.py

@@ -1527,6 +1527,8 @@ class MIoTClient:
             if did not in filter_dids:
                 continue
             device_old = self._device_list_gateway.get(did, None)
+            gw_state_old = device_old.get(
+                'online', False) if device_old else False
             gw_state_new: bool = False
             device_new = gw_list.pop(did, None)
             if device_new:
@@ -1540,7 +1542,7 @@ class MIoTClient:
                     device_old['online'] = False
             # Update cache group_id
             info['group_id'] = group_id
-            if not gw_state_new:
+            if (gw_state_old == gw_state_new) and (not gw_state_new):
                 continue
             self.__update_device_msg_sub(did=did)
             state_old: Optional[bool] = info.get('online', None)