Ticket #38903: 38903.diff

src/wp-includes/option.php

@@ -296 +296 @@
         $value = apply_filters( 'pre_update_option', $value, $option, $old_value );
 
         // If the new and old values are the same, no need to update.
-        if ( $value === $old_value )
+        if ( maybe_serialize( $value ) === maybe_serialize( $old_value ) ) {
                 return false;
+        }
 
         /** This filter is documented in wp-includes/option.php */
         if ( apply_filters( 'default_option_' . $option, false, $option, false ) === $old_value ) {