Estou atualizando um projeto para o jaxb 2.2.7 da versão 1.x.

Eu tenho o aplicativo funcionando algumas vezes, mas em algumas respostas, vejo o seguinte:

java.lang.RuntimeException: javax.xml.bind.MarshalException
- with linked exception:
[com.sun.istack.SAXException2: Instance of "com.mycompany.global.er.decoupling.binding.response.PricePointType$BalanceImpactRates$BalanceImpactRate" 
is substituting "java.lang.Object", but 
"com.mycompany.global.er.decoupling.binding.response.PricePointType$BalanceImpactRates$BalanceImpactRate"
 is bound to an anonymous type.]

Isso funcionou bem no jaxb 1.0. Não faço ideia do que possa ser o problema.

Aqui está um extrato do xsd (que não posso alterar, pois os clientes estão usando):

<xs:complexType name="price-pointType">
    <xs:sequence>
        <xs:element name="id" type="xs:string" />
.........
        <xs:element name="duration" type="durationType" />
        <xs:element name="order" type="xs:int" />
        <xs:element name="min-sub-period" type="xs:int" />
        <xs:element name="balance-impacts" minOccurs="0">
            <xs:complexType>
                <xs:sequence>
                    <xs:element name="balance-impact" type="charging-resourceType"
                        minOccurs="0" maxOccurs="unbounded" />
                </xs:sequence>
            </xs:complexType>
        </xs:element>
        <xs:element name="balance-impact-rates" minOccurs="0">
            <xs:complexType>
                <xs:sequence>
                    <xs:element name="balance-impact-rate" minOccurs="0"
                        maxOccurs="unbounded">
                        <xs:complexType>
                            <xs:sequence>
                                <xs:element name="rate" type="xs:double" />
                            </xs:sequence>
                            <xs:attribute name="charging-resource-code" type="xs:string"
                                use="required" />
                        </xs:complexType>
                    </xs:element>
                </xs:sequence>
            </xs:complexType>
        </xs:element>

Alguma sugestão?