XML Serializer does not serialize attributes for org.infinispan.persistence.cluster.ClusterLoader

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<namedCache name="withClusterLoader1">
        <persistence>
            <store class="org.infinispan.persistence.cluster.ClusterLoader" preload="true" fetchPersistentState="true" ignoreModifications="true" purgeOnStartup="true" shared="true">
                <properties>
                    <property name="remoteCallTimeout" value="15000" />
                </properties>
            </store>
        </persistence>
    </namedCache>
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<local-cache name="withClusterLoader1" statistics="false">
            <persistence>
                <cluster-loader remote-timeout="15000">
                    <property name="remoteCallTimeout">
                        15000
                    </property>
                </cluster-loader>
            </persistence>
        </local-cache>
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