Body of type Form does not honor resteasy.use.container.form.params setting

@Path("/")
public class MyResource {

    @POST
    @Path("/foo")
    public Response foo(Form form) {
        // form is empty
    }

    @POST
    @Path("/bar")
    public Response bar(MultivaluedMap<String, String> map) {
        // map is filled
    }
}