coalesce() creating unexpected results when used with order()

gremlin> g.V().
......1>   hasLabel("person").
......2>   out("created").
......3>   order().by("name").
......4>   coalesce(values("name").fold(), constant("x")).
......5>   fold()
==>[[lop,lop,lop],[lop,lop,lop],[lop,lop,lop],[ripple]]