enderchest items missing after rollback

My realm rolls back several times a day ( REALMS-11319 ) and a friend of mine misses items after rollback from enderchest.

Before the realm crash he placed shulkers from his enderchest and after the crash those shulkers + all items inside are gone. Everything for everyone rolled back like it should after a rollback but he lost 26 shulkers. Some days ago samething happend to him with 1 shulker with his important items.

Me myself lost 2 empty shulkers some days ago the same way. Getting them out of enderchest, crash happend, rolled back to a point they should be in enderchest but they aren't.