diff --git a/cpp/src/c_api/uniform_neighbor_sampling.cpp b/cpp/src/c_api/uniform_neighbor_sampling.cpp
index c2d7c6dee2a..978a254b80c 100644
--- a/cpp/src/c_api/uniform_neighbor_sampling.cpp
+++ b/cpp/src/c_api/uniform_neighbor_sampling.cpp
@@ -29,8 +29,6 @@
 
 #include <raft/core/handle.hpp>
 
-#include <iostream>
-
 namespace cugraph {
 namespace c_api {
 
@@ -157,6 +155,10 @@ struct uniform_neighbor_sampling_functor : public cugraph::c_api::abstract_funct
       auto number_map = reinterpret_cast<rmm::device_uvector<vertex_t>*>(graph_->number_map_);
 
       rmm::device_uvector<vertex_t> start_vertices(start_vertices_->size_, handle_.get_stream());
+      raft::copy(start_vertices.data(),
+            start_vertices_->as_type<vertex_t>(),
+            start_vertices.size(),
+            handle_.get_stream());
 
       std::optional<rmm::device_uvector<label_t>> start_vertex_labels{std::nullopt};
 
@@ -252,7 +254,6 @@ struct uniform_neighbor_sampling_functor : public cugraph::c_api::abstract_funct
       if (options_.renumber_results_) {
         if (options_.compression_type_ == cugraph_compression_type_t::COO) {
           // COO
-          std::cout << "retain seeds? " << options_.retain_seeds_ << std::endl;
 
           rmm::device_uvector<vertex_t> output_majors(0, handle_.get_stream());
           rmm::device_uvector<vertex_t> output_renumber_map(0, handle_.get_stream());
diff --git a/python/pylibcugraph/pylibcugraph/uniform_neighbor_sample.pyx b/python/pylibcugraph/pylibcugraph/uniform_neighbor_sample.pyx
index 81849e9fdc1..f002622f497 100644
--- a/python/pylibcugraph/pylibcugraph/uniform_neighbor_sample.pyx
+++ b/python/pylibcugraph/pylibcugraph/uniform_neighbor_sample.pyx
@@ -377,6 +377,8 @@ def uniform_neighbor_sample(ResourceHandle resource_handle,
     cugraph_type_erased_host_array_view_free(fan_out_ptr)
     if batch_id_list is not None:
         cugraph_type_erased_device_array_view_free(batch_id_ptr)
+    if label_offsets is not None:
+        cugraph_type_erased_device_array_view_free(label_offsets_ptr)
 
     # Have the SamplingResult instance assume ownership of the result data.
     result = SamplingResult()