diff --git a/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py b/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
index 0a7ba70dacc..372b7963835 100644
--- a/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
+++ b/litellm/llms/vertex_ai/gemini/vertex_and_google_ai_studio_gemini.py
@@ -2268,7 +2268,12 @@ class VertexGeminiConfig(VertexAIBaseConfig, BaseConfig):
                 return value
             model_extra = chunk.get("model_extra")
             if isinstance(model_extra, dict):
-                return model_extra.get(field_name)
+                value = model_extra.get(field_name)
+                if value is not None:
+                    return value
+            hidden_params = chunk.get("_hidden_params")
+            if isinstance(hidden_params, dict):
+                return hidden_params.get(field_name)
             return None
         return getattr(chunk, field_name, None)
 
diff --git a/tests/test_litellm/litellm_core_utils/test_streaming_chunk_builder_utils.py b/tests/test_litellm/litellm_core_utils/test_streaming_chunk_builder_utils.py
index 85661a9ecb9..867f4cc7a0f 100644
--- a/tests/test_litellm/litellm_core_utils/test_streaming_chunk_builder_utils.py
+++ b/tests/test_litellm/litellm_core_utils/test_streaming_chunk_builder_utils.py
@@ -720,7 +720,6 @@ def test_stream_chunk_builder_propagates_vertex_ai_metadata_from_dict_chunks():
             )
         ],
     ).model_dump()
-    chunk_dict["vertex_ai_grounding_metadata"] = [{"webSearchQueries": ["test query"]}]
     chunk_dict["_hidden_params"] = {
         "vertex_ai_grounding_metadata": [{"webSearchQueries": ["test query"]}]
     }