diff --git a/packages/leann-backend-diskann/leann_backend_diskann/diskann_embedding_server.py b/packages/leann-backend-diskann/leann_backend_diskann/diskann_embedding_server.py
index 1d042fd..f6c3825 100644
--- a/packages/leann-backend-diskann/leann_backend_diskann/diskann_embedding_server.py
+++ b/packages/leann-backend-diskann/leann_backend_diskann/diskann_embedding_server.py
@@ -80,6 +80,7 @@ def create_diskann_embedding_server(
     with open(passages_file) as f:
         meta = json.load(f)
 
+    logger.info(f"Loading PassageManager with metadata_file_path: {passages_file}")
     passages = PassageManager(meta["passage_sources"], metadata_file_path=passages_file)
     logger.info(
         f"Loaded PassageManager with {len(passages.global_offset_map)} passages from metadata"
diff --git a/packages/leann-backend-diskann/third_party/DiskANN b/packages/leann-backend-diskann/third_party/DiskANN
index c73bcec..b2dc4ea 160000
--- a/packages/leann-backend-diskann/third_party/DiskANN
+++ b/packages/leann-backend-diskann/third_party/DiskANN
@@ -1 +1 @@
-Subproject commit c73bcec98c956181602f42b94f00d6a24388c1f2
+Subproject commit b2dc4ea2c7e52e8a6481d3ba10003e192192a7b7
diff --git a/packages/leann-core/src/leann/api.py b/packages/leann-core/src/leann/api.py
index 25091f4..74562bc 100644
--- a/packages/leann-core/src/leann/api.py
+++ b/packages/leann-core/src/leann/api.py
@@ -132,12 +132,21 @@ class PassageManager:
                 if metadata_file_path:
                     # Resolve relative to metadata file directory
                     metadata_dir = Path(metadata_file_path).parent
+                    logger.debug(
+                        f"PassageManager: Resolving relative paths from metadata_dir: {metadata_dir}"
+                    )
                     index_file = str((metadata_dir / index_file).resolve())
                     passage_file = str((metadata_dir / passage_file).resolve())
+                    logger.debug(f"PassageManager: Resolved index_file: {index_file}")
                 else:
                     # Fallback to current directory resolution (legacy behavior)
+                    logger.warning(
+                        "PassageManager: No metadata_file_path provided, using fallback resolution from cwd"
+                    )
+                    logger.debug(f"PassageManager: Current working directory: {Path.cwd()}")
                     index_file = str(Path(index_file).resolve())
                     passage_file = str(Path(passage_file).resolve())
+                    logger.debug(f"PassageManager: Fallback resolved index_file: {index_file}")
 
             if not Path(index_file).exists():
                 raise FileNotFoundError(f"Passage index file not found: {index_file}")