I’m having a performance issue with non-needed SQL queries (Symfony 5.4, Doctrine 2, Elasticsearch 6.1.1, FosElastica 5.2)

Here are an extract of the concerned entities :

class Etablissement
{
    /**
     * @ORMManyToOne(targetEntity="AppEntityEtablissement", cascade={"persist"}, inversedBy="geres", fetch="EXTRA_LAZY")
     * @ORMJoinColumn(name="gestionnaire_id", referencedColumnName="id")
     */
    protected $gestionnaire; // The manager of this Etablissement, can be NULL

    /**
     * @ORMOneToMany(targetEntity="AppEntityEtablissement", mappedBy="gestionnaire", fetch="EXTRA_LAZY")
     * @ORMOrderBy({"type" = "ASC"})
     */
    protected $geres; // All the managed Etablissements

    /** @ORMOneToOne(targetEntity="TexteReferencement", mappedBy="etablissement", cascade={"persist"}) */
    protected $texteReferencement; // can be NULL

}

class TexteReferencement
{
    /**
     * @ORMOneToOne(targetEntity="Etablissement", inversedBy="texteReferencement", cascade={"persist"})
     * @ORMJoinColumn(name="etablissement_id", referencedColumnName="id", unique=true)
     */
    private $etablissement;
}

I’m using Elastica to get a list of Etablissement then display only the id. This is an example of the result :

The problem is Doctrine generates some extra SQL queries :

SELECT * FROM texte_referencement t0 WHERE t0.etablissement_id = 'GE075-46';
SELECT * FROM texte_referencement t0 WHERE t0.etablissement_id = 'GE075-103';

I’d like to get rid of thoes usesless queries since I don’t need data from texte_referencement

Maybe I’m wrong but this is my understanding of the workflow :

1. Elastica hydrates the Etablissement entity set
2. Since each Etablissement have a manager, Doctrine loads the manager of each Etablissement (if exists)
3. Since each Etablissement have a TexteReferencement, Doctrine loads the data for each manager

But this seems non-sence :

1. using fetch=”EXTRA_LAZY” should not run step #2
2. why do step #3 concerns only managed Etablissement ?