GraphQL service hangs when returning an array

[shafreenAnfar]

Program

import ballerina/graphql;

service /graphql on new graphql:Listener(9000) {
    resource function get allLifts(string status) returns Lift[] {
        return [new Lift()];               
    }
}

service class Lift {

    resource function get id () returns string|error {
        return "l1";
    }

    resource function get name () returns string|error {
        return "lift1";
    }
}

Request

curl -X POST -H "Content-Type: application/json" --data '{ "query": "{ allLifts(status:\"OPEN\") { name } }" }' http://localhost:9000/graphql