Add container=False

app.py

@@ -310,6 +310,7 @@ with gr.Blocks() as demo_leaderboard:
                                     and c.task_type == task_type
                                 ],
                                 elem_id="column-select",
+                                container=False,
                             )
                             shown_columns_dict[task_type.name] = shown_column
         with gr.Column(min_width=320):