diff --git a/js/clientside_validation.js b/js/clientside_validation.js
index 44b972c..ef33a86 100644
--- a/js/clientside_validation.js
+++ b/js/clientside_validation.js
@@ -258,6 +258,11 @@
           // Default behavior
           $element.removeClass(errorClass).addClass(validClass);
 
+          // Handle unhighlighting for chosen Drupal module
+          if ($element.hasClass('chosen-processed')) {
+            $element.siblings('div.chosen-container').removeClass(errorClass).addClass(validClass);
+          }
+
           // Sort the classes out for the tabs - we only want to remove the
           // highlight if there are no inputs with errors...
           var $fieldset = $element.parents('fieldset.vertical-tabs-pane');
@@ -282,6 +287,11 @@
           // Default behavior
           $element.addClass(errorClass).removeClass(validClass);
 
+          // Handle highlighting for chosen Drupal module
+          if ($element.hasClass('chosen-processed')) {
+            $element.siblings('div.chosen-container').addClass(errorClass).removeClass(validClass);
+          }
+
           // Sort the classes out for the tabs
           var $tab = self.findVerticalTab($element);
           if ($tab) {
@@ -362,6 +372,12 @@
               }
             }
 
+            // Trigger click event for chosen elements processed by Drupal chosen module
+            // This will allow the error message on the page to hide/show
+            $('.chosen-processed').change(function () {
+              $(this).trigger('click');
+            });
+
             /**
              * Notify that the form contains errors.
              * @event clientsideValidationFormHasErrors
@@ -531,7 +547,8 @@
       }
 
       if (!self.settings.includeHidden) {
-        validate_options.ignore = ':input:hidden';
+        // By default, only ignore hidden elements not processed by chosen Drupal module
+        validate_options.ignore = ':input:hidden:not(.chosen-processed)';
       }
       else {
         validate_options.ignore = '';
@@ -542,7 +559,8 @@
         }
       }
       else {
-        validate_options.ignore += ', .horizontal-tab-hidden :input';
+        // Patch found at https://www.drupal.org/project/clientside_validation/issues/2293259#comment-11287885
+        validate_options.ignore += (validate_options.ignore == '') ? '.horizontal-tab-hidden :input' : ', .horizontal-tab-hidden :input';
       }
       //Since we can only give boolean false to onsubmit, onfocusout and onkeyup, we need
       //a lot of if's (boolean true can not be passed to these properties).