db.createUser() screws up if I don't use quotes

MongoDB 4.0.10 (Windows x64)

NoSQLBooster 5.1.8

if I execute the following:

db.createUser({ user: "root", pwd: "password", roles: [ { role: "root", db: "admin" } ] });

Looking up the user in the system.users collection I see:

{
    "_id" : "admin;.root",
    "userId" : UUID("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"),
    "user" : "root",
    "db" : "admin;",
    "credentials" : {
        "SCRAM-SHA-1" : { ... },
        "SCRAM-SHA-256" : { ... }
    },
    "customData" : { },
    "roles" : [ { "role" : "root", "db" : "admin" } ]
}

Notice the `db` is "admin;" with a semi-colon at the end... as is the prefix in the `_id`.

However, if I execute:

(note the quotes around the role property names - "role"/"db")

db.createUser({ user: "root", pwd: "password", roles: [ { "role": "root", "db": "admin" } ] });

It works and I can authenticate.

This creates a user record like this:

{
    "_id" : "admin.root",
    "userId" : UUID("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"),
    "user" : "root",
    "db" : "admin",
    "credentials" : {
        "SCRAM-SHA-1" : { ... },
        "SCRAM-SHA-256" : { ... }
    },
    "customData" : { },
    "roles" : [ { "role" : "root", "db" : "admin" } ]
}

It took me quite a while to figure out why my new DB initialization was failing.

I've never seen this before on MongoDB < 3.6, and I've only just started using NoSQLBooster after migrating from another product.

Any idea if this is a MongoDB issue, or a NoSQLBooster IDE issue?

Thanks.