Password is not saved when setting email alerts

Set up a single node and run the following commands:

curl http://127.0.0.1:9000/settings/alerts -X POST -u Administrator:password -d "enabled=true&recipients=root@couchbase.com&sender=user@couchbase.com&emailUser=username&emailPass=password&emailPort=25&emailHost=localhost&emailEncrypt=false&alerts=auto_failover_node"

curl http://127.0.0.1:9000/settings/alerts -u Administrator:password | jq .
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 203 100 203 0 0 195k 0 -::- -::- -::- 198k
{
"recipients": [
"root@couchbase.com"
],
"sender": "user@couchbase.com",
"enabled": true,
"emailServer":

{ "user": "username", "pass": "", "host": "localhost", "port": 25, "encrypt": false }

,
"alerts": [
"auto_failover_node"
]
}

Note that the "pass" field is empty.