diff --git a/js/common.js b/js/common.js
index c4147cfe247..34e47947fa7 100644
--- a/js/common.js
+++ b/js/common.js
@@ -1904,7 +1904,7 @@ function setupAdaptDropdown(config)
     }
     const select2_el = $('#' + field_id).select2(options);
 
-    select2_el.bind('setValue', (e, value) => {
+    select2_el.bind('setValue', (e, ...value) => {
         $('#' + field_id).val(value).trigger('change');
     });
     $('label[for=' + field_id + ']').on('click', function () {
diff --git a/templates/components/itilobject/timeline/form_validation.html.twig b/templates/components/itilobject/timeline/form_validation.html.twig
index ae33edb00ec..c561434dbf3 100644
--- a/templates/components/itilobject/timeline/form_validation.html.twig
+++ b/templates/components/itilobject/timeline/form_validation.html.twig
@@ -352,6 +352,7 @@
                   $("#dropdown__validatortype_{{ rand }}").trigger('setValue', data.validatortype);
 
                   if (data.groups_id !== undefined && data.groups_id !== null) {
+                     // Approver is a group or multiple users of a group
                      waitForElement("#dropdown_groups_id{{ rand }}").then((elm) => {
                         // set groups_id
                         $("#dropdown_groups_id{{ rand }}").ready(function() {
@@ -366,6 +367,7 @@
                         });
                      });
                   } else if (data.items_id_target !== undefined) {
+                     // Approver is a single user
                      new Promise((resolve) => {
                         // if dropdown_items_id_target exists, wait for it to be removed
                         // is required because the dropdown is removed and recreated when the setValue is triggered