Done. If you open the service MainDB_MainDB_Houses_query_service, after login in with MainDB_login_service to get a session token (username: test, password: test123), then try to test that service using while: {"User":"test"} and leave sort parameter blank and you will see the bug. Alternatively, try the service MainDB_MainDB_Houses_query_service_nosort which has sort parameter removed using the same "while" search and it will work.