Ticket #38929: 38929.2.diff

src/wp-settings.php

@@ -80 +80 @@
  *                                    Default true.
  */
 if ( WP_CACHE && apply_filters( 'enable_loading_advanced_cache_dropin', true ) ) {
-// For an advanced caching plugin to use. Uses a static drop-in because you would only want one.
+        // For an advanced caching plugin to use. Uses a static drop-in because you would only want one.
         WP_DEBUG ? include( WP_CONTENT_DIR . '/advanced-cache.php' ) : @include( WP_CONTENT_DIR . '/advanced-cache.php' );
+
+        // Re-initialize any hooks added manually by advanced-cache.php
+        if ( $wp_filter ) {
+                $wp_filter = WP_Hook::build_preinitialized_hooks( $wp_filter );
+        }
 }
 
 // Define WP_LANG_DIR if not set.