Null contactList for customer

I am retrieving a customer record using NetSuiteService.get, however the resulting customer record returned has a null contact list (and a lot of other null properties). I know there are contacts for this customer and I have tried multiple customers. I also swear that my code worked fine previously, as I have written other code that relies on the contactList. Can anyone shed light on this?

Here is some example code to re-produce the problem:

            NetSuiteService service = new NetSuiteService();              service.Url = ConfigurationManager.AppSettings["SuiteTalkUrl"];              service.CookieContainer = new System.Net.CookieContainer();                // Invoke the login operation              Passport passport = new Passport();              passport.account = ConfigurationManager.AppSettings["SuiteTalkAccount"];              passport.password = ConfigurationManager.AppSettings["SuiteTalkPassword"];              passport.email = ConfigurationManager.AppSettings["SuiteTalkEmail"];              RecordRef role = new RecordRef();              role.internalId = "18";              passport.role = role;              var result = service.login(passport);                if (!result.status.isSuccess) throw new Exception("could not login");                            ReadResponse response = null;              RecordRef recordRef = new RecordRef();                recordRef.internalId = "411";              recordRef.type = RecordType.customer;              recordRef.typeSpecified = true;              response = service.get(recordRef);                if (response.status.isSuccess)              {                  Customer c = response.record as Customer;                  //c.contactList is null              }