diff --git a/packages/simcore-sdk/src/simcore_sdk/node_ports_common/r_clone_utils.py b/packages/simcore-sdk/src/simcore_sdk/node_ports_common/r_clone_utils.py
index f539e4510262..fa34b0426a06 100644
--- a/packages/simcore-sdk/src/simcore_sdk/node_ports_common/r_clone_utils.py
+++ b/packages/simcore-sdk/src/simcore_sdk/node_ports_common/r_clone_utils.py
@@ -44,6 +44,7 @@ class _RCloneSyncTransferringMessage(_RCloneSyncMessageBase):
     _RCloneSyncTransferCompletedMessage,
     _RCloneSyncUpdatedMessage,
     _RCloneSyncTransferringMessage,
+    _RCloneSyncMessageBase,
 ]
 
 
diff --git a/packages/simcore-sdk/tests/unit/test_node_ports_common_r_clone_utils.py b/packages/simcore-sdk/tests/unit/test_node_ports_common_r_clone_utils.py
new file mode 100644
index 000000000000..13d2bed60420
--- /dev/null
+++ b/packages/simcore-sdk/tests/unit/test_node_ports_common_r_clone_utils.py
@@ -0,0 +1,75 @@
+import json
+from unittest.mock import AsyncMock
+
+import pytest
+from pydantic import parse_raw_as
+from simcore_sdk.node_ports_common.r_clone_utils import (
+    SyncProgressLogParser,
+    _RCloneSyncMessageBase,
+    _RCloneSyncMessages,
+    _RCloneSyncTransferCompletedMessage,
+    _RCloneSyncTransferringMessage,
+    _RCloneSyncUpdatedMessage,
+)
+
+
+@pytest.mark.parametrize(
+    "log_message,expected",
+    [
+        (
+            '{"level":"info","msg":"There was nothing to transfer","source":"sync/sync.go:954","time":"2024-09-25T10:18:04.904537+00:00"}',
+            _RCloneSyncMessageBase,
+        ),
+        (
+            '{"level":"info","msg":"","object":".hidden_do_not_remove","objectType":"*s3.Object","source":"operations/operations.go:277","time":"2024-09-24T07:11:22.147117+00:00"}',
+            _RCloneSyncUpdatedMessage,
+        ),
+        (
+            '{"level":"info","msg":"Copied (new)","object":"README.ipynb","objectType":"*s3.Object","size":5123,"source":"operations/copy.go:360","time":"2024-04-23T14:05:10.408277+00:00"}',
+            _RCloneSyncTransferCompletedMessage,
+        ),
+        (
+            json.dumps(
+                {
+                    "level": "",
+                    "msg": "",
+                    "source": "",
+                    "time": "2024-09-24T07:11:22.147117+00:00",
+                    "object": "str",
+                }
+            ),
+            _RCloneSyncUpdatedMessage,
+        ),
+        (
+            json.dumps(
+                {
+                    "level": "",
+                    "msg": "",
+                    "source": "",
+                    "time": "2024-09-24T07:11:22.147117+00:00",
+                    "object": "str",
+                    "size": 1,
+                }
+            ),
+            _RCloneSyncTransferCompletedMessage,
+        ),
+        (
+            json.dumps(
+                {
+                    "level": "",
+                    "msg": "",
+                    "source": "",
+                    "time": "2024-09-24T07:11:22.147117+00:00",
+                    "stats": {"bytes": 1, "totalBytes": 1},
+                }
+            ),
+            _RCloneSyncTransferringMessage,
+        ),
+    ],
+)
+async def test_rclone_stbc_message_parsing_regression(log_message: str, expected: type):
+    parsed_log = parse_raw_as(_RCloneSyncMessages, log_message)  # type: ignore[arg-type]
+    assert isinstance(parsed_log, expected)
+
+    progress_log_parser = SyncProgressLogParser(AsyncMock())
+    await progress_log_parser(log_message)