identityManager.update() does not persist in JPA Provider

@ApplicationScoped
public class IdmConfiguration {

	@Inject
	private EntityManagerContextInitializer contextInitializer;

	@PicketLink
	@Produces
	public PartitionManager producePartitionManager() {
		IdentityConfigurationBuilder builder = new IdentityConfigurationBuilder();
		
		builder.named("default")
        .stores()
            .jpa()
            .mappedEntity(AccountTypeEntity.class, RoleTypeEntity.class,
						GroupTypeEntity.class, IdentityTypeEntity.class,
						RelationshipTypeEntity.class,
						RelationshipIdentityTypeEntity.class,
						PartitionTypeEntity.class,
						PasswordCredentialTypeEntity.class,
						DigestCredentialTypeEntity.class,
						X509CredentialTypeEntity.class,
						OTPCredentialTypeEntity.class,
						AttributeTypeEntity.class,
						PermissionTypeEntity.class)
            .addContextInitializer(this.contextInitializer)
                .supportAllFeatures();

		return new DefaultPartitionManager(builder.buildAll());
	}
}

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
	xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://www.oracle.com/webfolder/technetwork/jsc/xml/ns/persistence/persistence_2_1.xsd">
	<persistence-unit name="${persistence.unit}"
		transaction-type="JTA">
		<jta-data-source>${jta-data-source}</jta-data-source>
		<!-- Picketlink -->
		<class>org.picketlink.idm.jpa.model.sample.simple.AbstractCredentialTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.AccountTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.AttributedTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.AttributeTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.DigestCredentialTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.GroupTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.IdentityTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.OTPCredentialTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.PartitionTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.PasswordCredentialTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.RelationshipIdentityTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.RelationshipTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.RoleTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.TokenCredentialTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.X509CredentialTypeEntity</class>
		<class>org.picketlink.idm.jpa.model.sample.simple.PermissionTypeEntity</class>
		<properties>

			<property name="eclipselink.target-server"
				value="org.eclipse.persistence.platform.server.glassfish.GlassfishPlatform" />
			<property name="eclipselink.target-database" value="${persistence.eclipselink.target-database}" />

			<property name="eclipselink.ddl-generation" value="${persistence.eclipselink.ddl-generation}" />
			<property name="eclipselink.ddl-generation.output-mode"
				value="${persistence.eclipselink.ddl-generation.output-mode}" />
			<property name="eclipselink.create-ddl-jdbc-file-name"
				value="create.sql" />
			<property name="eclipselink.drop-ddl-jdbc-file-name" value="drop.sql" />

			<!-- Default true (to enable lazyloading of LOB) -->
			<property name="eclipselink.weaving" value="static" />

			<property name="eclipselink.logging.level" value="WARNING" />
			<property name="eclipselink.logging.level.sql" value="FINE" />
			<property name="eclipselink.logging.parameters" value="true" />

			<property name="eclipselink.create-ddl-jdbc-file-name"
				value="createDDL_ddlGeneration.jdbc" />
			<property name="eclipselink.drop-ddl-jdbc-file-name" value="dropDDL_ddlGeneration.jdbc" />
		</properties>
	</persistence-unit>
</persistence>