JAXB cyclic reference with colliding id values (between parent and children)

I have a problem while unmarshalling some xml in objects with cyclic references to one another. This is my xml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<computer>
    <computerId>3</computerId>
    <keyboard>
        <computer>3</computer>
        <keyboardId>3</keyboardId>
    </keyboard>
    <keyboard>
        <computer>3</computer>
        <keyboardId>1</keyboardId>
    </keyboard>
</computer>

And here are my JAXB enabled classes: Computer.java:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "computer", propOrder = {
    "computerId",
    "keyboard"
})
@XmlRootElement
public class Computer {

    @XmlJavaTypeAdapter(CollapsedStringAdapter.class)
    @XmlID
    @XmlSchemaType(name = "ID")
    protected String computerId;
    protected List<Keyboard> keyboard;

    public String getComputerId() {
        return computerId;
    }

    public void setComputerId(String value) {
        this.computerId = value;
    }

    public List<Keyboard> getKeyboard() {
        if (keyboard == null) {
            keyboard = new ArrayList<Keyboard>();
        }
        return keyboard;
    }
}

Keyboard.java:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "keyboard", propOrder = {
    "computer",
    "keyboardId"
})
public class Keyboard {

    @XmlElement(type = Computer.class)
    @XmlIDREF
    @XmlSchemaType(name = "IDREF")
    protected Computer computer;
    @XmlJavaTypeAdapter(CollapsedStringAdapter.class)
    @XmlID
    @XmlSchemaType(name = "ID")
    protected String keyboardId;

    public Computer getComputer() {
        return computer;
    }

    public void setComputer(Computer value) {
        this.computer = value;
    }

    public String getKeyboardId() {
        return keyboardId;
    }

    public void setKeyboardId(String value) {
        this.keyboardId = value;
    }

}

When I try to unmarshal the xml uptop the second keyboard object has its computer field null. If I try it with this xml (notice the order of the two keyboards changed) everything works fine:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<computer>
    <computerId>3</computerId>
    <keyboard>
        <computer>3</computer>
        <keyboardId>1</keyboardId>
    </keyboard>
    <keyboard>
        <computer>3</computer>
        <keyboardId>3</keyboardId>
    </keyboard>
</computer>

Can somebody help me so that both examples can be unmarshalled without any null fields.

Thanks.