Fix Alt Text 1.9.1 — wp_suspend_cache_addition( true ) is never restored, degrading the object cache for the rest of every save request
Fix Alt Text calls wp_suspend_cache_addition( true ) at the top of its save_post, attachment_updated, add_attachment, saved_term and delete_term handlers and never calls wp_suspend_cache_addition( false ) afterward. Because a define() guard prevents the call from repeating, the suspension is set once and stays set for the remainder of the PHP request.
wp_suspend_cache_addition() gates wp_cache_add() and wp_cache_add_multiple(), which is exactly what WordPress core's update_meta_cache() and _prime_post_caches() use to populate their caches — so from the first post save onward, cache priming silently no-ops and every subsequent get_post_meta() / metadata_exists() / post lookup goes back to the database.
This is a performance and correctness bug, not a security issue. It is most visible on wp-admin/post-new.php (which alway