diff --git a/src/pydase/data_service/data_service_observer.py b/src/pydase/data_service/data_service_observer.py
index 424a199..febd157 100644
--- a/src/pydase/data_service/data_service_observer.py
+++ b/src/pydase/data_service/data_service_observer.py
@@ -37,8 +37,9 @@ class DataServiceObserver(PropertyObserver):
         )
 
         cached_value = cached_value_dict.get("value")
-        if cached_value != dump(value)["value"] and all(
-            part[0] != "_" for part in full_access_path.split(".")
+        if (
+            all(part[0] != "_" for part in full_access_path.split("."))
+            and cached_value != dump(value)["value"]
         ):
             logger.debug("'%s' changed to '%s'", full_access_path, value)