#DRUPAL#8#PATCH# Open first field group tab on form element error.

show-first-tab-on-form-error-field-group-8.x-1.0.patch

diff --git a/formatters/tabs/tabs.js b/formatters/tabs/tabs.js
index c2c5b5d3..3a652060 100644
--- a/formatters/tabs/tabs.js
+++ b/formatters/tabs/tabs.js
@@ -15,7 +15,7 @@
 
         // Add required fields mark to any element containing required fields
         var direction = group_info.settings.direction;
-        $(context).find('[data-' + direction + '-tabs-panes] details').once('fieldgroup-effects').each(function () {
+          $($(context).find('[data-' + direction + '-tabs-panes] details').once('fieldgroup-effects').get().reverse()).each(function () {
 
           var $this = $(this);
           if (typeof $(this).data(direction + 'Tab') !== 'undefined') {