Inconsistent usernames used in audit log for eventing lifecycle operations

In audit log we see the user Administrator and @eventing-cbauth interchangeably used for different lifecycle operations. It seems inconsistent. Set settings some times use Administrator and sometimes @eventing-cbauth.

{"timestamp":"2018-08-09T23:36:14.534934-07:00","real_userid":

{"domain":"internal","user":"couchbase"}

,"auditd_enabled":true,"descriptors_path":"/opt/couchbase/etc/security","hostname":"node2-cb500-centos7.vagrants","log_path":"/opt/couchbase/var/lib/couchbase/logs","rotate_interval":86400,"version":2,"uuid":"30277770","id":4096,"name":"configured audit daemon","description":"loaded configuration file for audit daemon"}
{"timestamp":"2018-08-09T23:36:52.059-07:00","real_userid":

{"domain":"builtin","user":"Administrator"}

,"context":"Function_219648511_test_eventing_audit_logging","id":32768,"name":"Create Function","description":"Eventing function definition was created or updated"}
{"timestamp":"2018-08-09T23:36:53.282-07:00","real_userid":

{"domain":"builtin","user":"Administrator"}

,"context":"Function_219648511_test_eventing_audit_logging","id":32774,"name":"Save Draft","description":"Save a draft definition to the store"}
{"timestamp":"2018-08-09T23:38:04.866-07:00","real_userid":

{"domain":"builtin","user":"Administrator"}

,"context":"Function_219648511_test_eventing_audit_logging","id":32779,"name":"Set Settings","description":"Save settings for a given app"}
{"timestamp":"2018-08-09T23:38:17.164-07:00","real_userid":

{"domain":"builtin","user":"@eventing-cbauth"}

,"context":"Function_219648511_test_eventing_audit_logging","id":32779,"name":"Set Settings","description":"Save settings for a given app"}
{"timestamp":"2018-08-09T23:38:40.054-07:00","real_userid":

{"domain":"builtin","user":"Administrator"}

,"context":"Function_219648511_test_eventing_audit_logging","id":32769,"name":"Delete Function","description":"Eventing function definition was deleted"}
{"timestamp":"2018-08-09T23:38:40.072-07:00","real_userid":

{"domain":"builtin","user":"Administrator"}

,"context":"Function_219648511_test_eventing_audit_logging","id":32773,"name":"Delete Drafts","description":"Eventing function draft definitions were deleted"}