limit bestbet searchs to title_1 field

modules/solr_site/src/Controller/RoblibSearchSolrsiteController.php

@@ -66,6 +66,7 @@ class RoblibSearchSolrsiteController extends ControllerBase {
     $query->keys($queryString);
     if ($solr_type == 'BestBet') {
       $query->addCondition('type', 'bestbet', '=');
+      $query->setFulltextFields(['title_1']);
     } else {
       $query->addCondition('type', 'bestbet', '<>');
     }