diff --git a/qdrant_client/conversions/conversion.py b/qdrant_client/conversions/conversion.py
index d9c7639b..8205673a 100644
--- a/qdrant_client/conversions/conversion.py
+++ b/qdrant_client/conversions/conversion.py
@@ -2432,8 +2432,12 @@ def convert_vector(vector: Union[List[float], List[List[float]]]) -> grpc.Vector
                 vector[0], list
             ):  # we can't say whether it is an empty dense or multi-dense vector
                 return grpc.Vector(
-                    data=[inner_vector for multi_vector in model for inner_vector in multi_vector],
-                    vectors_count=len(model),
+                    data=[
+                        inner_vector
+                        for multi_vector in vector
+                        for inner_vector in multi_vector  # type: ignore
+                    ],
+                    vectors_count=len(vector),
                 )
             return grpc.Vector(data=vector)
 
@@ -2598,7 +2602,7 @@ def convert_prefetch_query(cls, model: rest.Prefetch) -> grpc.PrefetchQuery:
 
         return grpc.PrefetchQuery(
             prefetch=prefetch,
-            query=cls.convert_query(model.query) if model.query is not None else None,
+            query=cls.convert_query_interface(model.query) if model.query is not None else None,
             using=model.using if model.using is not None else None,
             filter=cls.convert_filter(model.filter) if model.filter is not None else None,
             params=cls.convert_search_params(model.params) if model.params is not None else None,
diff --git a/tests/congruence_tests/test_query.py b/tests/congruence_tests/test_query.py
index 5d489258..63fc0053 100644
--- a/tests/congruence_tests/test_query.py
+++ b/tests/congruence_tests/test_query.py
@@ -83,6 +83,24 @@ def dense_query_text(self, client: QdrantBase) -> models.QueryResponse:
             limit=10,
         )
 
+    def dense_query_text_np_array(self, client: QdrantBase) -> models.QueryResponse:
+        return client.query_points(
+            collection_name=COLLECTION_NAME,
+            query=np.array(self.dense_vector_query_text),
+            using="text",
+            with_payload=True,
+            limit=10,
+        )
+
+    def dense_query_text_by_id(self, client: QdrantBase) -> models.QueryResponse:
+        return client.query_points(
+            collection_name=COLLECTION_NAME,
+            query=1,
+            using="text",
+            with_payload=True,
+            limit=10,
+        )
+
     def dense_query_image(self, client: QdrantBase) -> models.QueryResponse:
         return client.query_points(
             collection_name=COLLECTION_NAME,
@@ -1100,3 +1118,50 @@ def test_query_with_nan():
         print(local_client.query_points(COLLECTION_NAME, query=query))
     with pytest.raises(UnexpectedResponse):
         remote_client.query_points(COLLECTION_NAME, query=query)
+
+
+@pytest.mark.parametrize("prefer_grpc", (False, True))
+def test_flat_query_dense_interface(prefer_grpc):
+    fixture_points = generate_fixtures()
+
+    searcher = TestSimpleSearcher()
+
+    local_client = init_local()
+    init_client(local_client, fixture_points)
+
+    remote_client = init_remote(prefer_grpc=prefer_grpc)
+    init_client(remote_client, fixture_points)
+
+    compare_client_results(local_client, remote_client, searcher.dense_query_text)
+    compare_client_results(local_client, remote_client, searcher.dense_query_text_np_array)
+    compare_client_results(local_client, remote_client, searcher.dense_query_text_by_id)
+
+
+@pytest.mark.parametrize("prefer_grpc", (False, True))
+def test_flat_query_sparse_interface(prefer_grpc):
+    fixture_points = generate_sparse_fixtures()
+
+    searcher = TestSimpleSearcher()
+
+    local_client = init_local()
+    init_client(local_client, fixture_points, sparse_vectors_config=sparse_vectors_config)
+
+    remote_client = init_remote(prefer_grpc=prefer_grpc)
+    init_client(remote_client, fixture_points, sparse_vectors_config=sparse_vectors_config)
+
+    compare_client_results(local_client, remote_client, searcher.sparse_query_text)
+
+
+@pytest.mark.parametrize("prefer_grpc", (True,))
+def test_flat_query_multivector_interface(prefer_grpc):
+    fixture_points = generate_multivector_fixtures()
+
+    searcher = TestSimpleSearcher()
+
+    local_client = init_local()
+    init_client(local_client, fixture_points, vectors_config=multi_vector_config)
+
+    remote_client = init_remote(prefer_grpc=prefer_grpc)
+    init_client(remote_client, fixture_points, vectors_config=multi_vector_config)
+
+    compare_client_results(local_client, remote_client, searcher.multivec_query_text)
diff --git a/tests/conversions/fixtures.py b/tests/conversions/fixtures.py
index 86b21c09..0e0b6a90 100644
--- a/tests/conversions/fixtures.py
+++ b/tests/conversions/fixtures.py
@@ -568,6 +568,7 @@
             "sparse": grpc.Vector(
                 data=[1.0, 2.0, -1.0, -0.2], indices=SparseIndices(data=[1, 2, 3])
             ),
+            "multi": grpc.Vector(data=[1.0, 2.0, 3.0, 4.0], vectors_count=2),
         }
     )
 )