@XmlTransient doesn't work for JSON responses

Using Jackson provider, the JAXB @XmlTransient annotation works fine for XML responses, but doesn't for JSON.

With the following JAXB class:

    private String ignored;
    @XmlTransient
    public String getIgnored() { return ignored; }

for "application/xml" I got:

<return>
  <message>
    <content>Goodbye, RESTEasy!</content>
  </message>
</return>

but for "application/json" I got:

{
  "message" : {
    "content" : "Hello, RESTEasy!",
    "ignored" : "Ignore me!!!"
  }
}

This issue happens only with RESTEasy 2.x. I confirmed it doesn't happen with RESTEasy 3.x.