dynlist expantion on search with an attribute set

Hello

I have an object class that triggers slapo-dynlist expantion. It works very well if I request the whole object:

$ ldapsearch uid=foo <here I get the object with dynlist expanded>

But if I request an attribut set that contains the attribute to be expanded (here mail), it does not work: $ ldapsearch uid=foo mail <dynlist not expanded>

Adding memberURL does not help: $ ldapsearch uid=foo memberURL <dynlist not expanded>

Is it on purpose? Is there a work around? It is troublesome since the client application does ask for a set of attribute...