Do not attempt to invalidate group content list cache tags if the gro…

…up itself changes.

If the group content list includes any data from the group itself then the
list will be tagged with the group cache tags and will be invalidated
automatically if the group is saved.

og.module

@@ -329,12 +329,10 @@ function og_theme($existing, $type, $theme, $path) {
 function og_invalidate_group_content_cache_tags(EntityInterface $entity) {
   // If group content is created or updated, invalidate the group content cache
   // tags for each of the groups this group content belongs to. This allows
-  // group listings to be cached effectively. Also invalidate the tags if the
-  // group itself changes. The cache tag format is
+  // group listings to be cached effectively. The cache tag format is
   // 'og-group-content:{group entity type}:{group entity id}'.
   $is_group_content = Og::isGroupContent($entity->getEntityTypeId(), $entity->bundle());
-  $group_is_updated = Og::isGroup($entity->getEntityTypeId(), $entity->bundle()) && !empty($entity->original);
-  if ($group_is_updated || $is_group_content) {
+  if ($is_group_content) {
     /** @var \Drupal\og\MembershipManagerInterface $membership_manager */
     $membership_manager = \Drupal::service('og.membership_manager');
     $tags = [];
@@ -345,7 +343,7 @@ function og_invalidate_group_content_cache_tags(EntityInterface $entity) {
     // the tags of the old group(s).
     /** @var \Drupal\Core\Entity\FieldableEntityInterface $entity */
     $original = !empty($entity->original) ? $entity->original : NULL;
-    if ($is_group_content && $original) {
+    if ($original) {
       /** @var \Drupal\og\OgGroupAudienceHelperInterface $group_audience_helper */
       $group_audience_helper = \Drupal::service('og.group_audience_helper');
       /** @var \Drupal\Core\Entity\FieldableEntityInterface $original */