Changing index_path does not trigger audit event

1) Install CB Server
2) Change index path using following command:
curl -X POST -u Administrator:password -d index_path=/tmp http://172.23.107.64:8091/nodes/self/controller/settings -v
3) Verify on machine that path for index has changed

Verify audit.log - for event -

"id": 8206,
"name": "disk storage conf",
"description": "Disk storage configuration was set",
"sync": false,
"enabled": true,
"mandatory_fields": {
"timestamp": "",
"real_userid":

{ "source": "", "user": "" }

,
"remote":

{ "ip": "", "port": 1 }

,
"node": "",
"db_path": "",
"index_path": ""
},
"optional_fields":

{ "sessionid": "" }