Expected behavior Auto complete to keep working when typing space a te the beginning

Actual behavior Au complete stop functionning, the dropdown no longer opens even if the backend is called dans the array is filled up

Resources (screenshots, code snippets etc.)

Here is the sample code used

function InitModalMailAutoComplete() {

//Promise pour aller chercher les courriels de l'autocomplete
const asyncFilter = async (query) => {

    var results = [];

    //Si on est vide on retourne un tableau vide
    if (commonLib.isNullOrEmpty(query)) {
        return results;
    }

    await axios.get(`/api/user/search/active/directory?email=${encodeURI(query)}`).then(function (response) {
        let mailsFound = response.data || [];
        //Assignation des propriétés de l'AD au résultats
        if (mailsFound.length > 0) {
            $.each(mailsFound, function () {
                results.push({
                    email: this.properties?.mail?.toString(),
                    nom: this.properties?.sn?.toString(),
                    prenom: this.properties?.givenName?.toString(),
                    login: this.properties?.samAccountName?.toString()
                });
            });
        }
    })
    .catch(function (error) {
        toastr.error(Labels.Current.ERRRecuperationDonnesEnEchec);
    });

    return results;
};
//Instance du champ courriel
const asyncAutocomplete = $(ADMIN_USER_MODAL_MAIL)[0];
//Active le composant autocomple de MDB
mdbMail = new mdb.Autocomplete(asyncAutocomplete, {
    filter: asyncFilter,
    threshold: 3,
    displayValue: (value) => value?.email || ""
});

mdbMail._options.noResults = Labels.Current.DTNET_Language_NoEntryFound;

//On rempli les champs du modal d'ajout quand l'utilisateur a choisi un courriel dans la liste
$(ADMIN_USER_MODAL_MAIL).on('itemSelect.mdb.autocomplete', function (e) {
    $(ADMIN_USER_MODAL_LOGIN).val(e.value.login).focus();
    $(ADMIN_USER_MODAL_PRENOM).val(e.value.prenom).focus();
    $(ADMIN_USER_MODAL_NOM).val(e.value.nom).focus();
});

}