after an HQL bulk update to 11   : find() sees 11 (L2 hits=0 misses=1)
after a native bulk update to 12 : find() sees 12 (L2 hits=0 misses=1)
after raw JDBC update to 13      : find() sees 12 (L2 hits=1 misses=0)  <- stale: Hibernate was not told