BulkOperations inconsistently updates audit fields

[shollander]

When doing a bulk insert (using MongoOperations.bulkOps()), there is an inconsistency with how audit annotations are handled.

Fields annotated with @LastModifiedDate are updated.

Fields annotated with @CreatedDate are not updated.

[christophstrobl]

Thank you @shollander for getting in touch - it would help if you could please take the time to provide a complete minimal sample (something that we can unzip or git clone, build, and deploy) that reproduces the problem.