se agrego el minimo de caracteres para llamada ajax

src/WebserviceBundle/Controller/WebserviceController.php

@@ -17,13 +17,6 @@ class WebserviceController extends Controller
         $choice_list = $choice_loader->getChoicesList($query);
         $list_values = [];
 
-        if (strlen($query) > 0) {
-            $list_values[] = [
-                'id' => 'create:' . $query,
-                'text' => $query . ' *'
-            ];
-        }
-
         foreach ($choice_list as $label => $id) {
             $list_values[] = [
                 'id' => $id,

src/WebserviceBundle/Resources/views/Type/remote_client_widget.html.twig

@@ -20,8 +20,10 @@
                     delay: 250,
                     data: getAjaxListData,
                     cache: true,
-                    language: '{{ locale }}'
-            }});
+                },
+                language: "{{ locale }}",
+                minimumInputLength: 3
+        });
         });
         </script>
         {{ block('choice_widget') }}