[skip ci] Fix assign yourself bug

app/assets/javascripts/gl_dropdown.js

@@ -446,15 +446,36 @@ GitLabDropdown = (function() {
     }
   };
 
+  GitLabDropdown.prototype.filteredFullData = function() {
+    return this.fullData.filter(r => typeof r === 'object'
+      && !Object.prototype.hasOwnProperty.call(r, 'beforeDivider')
+      && !Object.prototype.hasOwnProperty.call(r, 'header')
+    );
+  };
+
   GitLabDropdown.prototype.opened = function(e) {
     var contentHtml;
     this.resetRows();
     this.addArrowKeyEvent();
 
+    const dropdownToggle = this.dropdown.find('.dropdown-menu-toggle');
+    const hasFilterBulkUpdate = dropdownToggle.hasClass('js-filter-bulk-update');
+    const hasMultiSelect = dropdownToggle.hasClass('js-multiselect');
+
     // Makes indeterminate items effective
-    if (this.fullData && this.dropdown.find('.dropdown-menu-toggle').hasClass('js-filter-bulk-update')) {
+    if (this.fullData && hasFilterBulkUpdate) {
       this.parseData(this.fullData);
     }
+
+    // Process the data to make sure rendered data
+    // matches the correct layout
+    if (this.fullData && hasMultiSelect) {
+      const inputValue = this.filterInput.val();
+      const users = this.filteredFullData();
+
+      this.options.processData.call(this.options, inputValue, users, this.parseData.bind(this));
+    }
+
     contentHtml = $('.dropdown-content', this.dropdown).html();
     if (this.remote && contentHtml === "") {
       this.remote.execute();

app/assets/javascripts/users_select.js

@@ -278,10 +278,7 @@ import eventHub from './sidebar/event_hub';
 
               if (this.multiSelect && inputValue === '') {
                 // Remove non-users from the fullData array
-                const users = glDropdown.fullData.filter(r => typeof r === 'object'
-                    && !Object.prototype.hasOwnProperty.call(r, 'beforeDivider')
-                    && !Object.prototype.hasOwnProperty.call(r, 'header')
-                  );
+                const users = glDropdown.filteredFullData();
                 const callback = glDropdown.parseData.bind(glDropdown);
 
                 // Update the data model