Filter wr_query_replace_placeholder:

This Filter allows you to change placeholder after query replacing placeholders.

add_filter("wr_query_replace_placeholder", array( $this, "my_query_replace_placeholder" ), 10, 1 );

public function my_query_replace_placeholder($parameter) {

  if(isset($parameter["my_placeholder"])) {
    $parameter["my_placeholder"] = "new value";
  }

  return $parameter;
}

Changes Queries from

SELECT id, description FROM wp_wr_service WHERE identifier like '%##my_placeholder##';

to

SELECT id, description FROM wp_wr_service WHERE identifier like '%new value';