Hi Elliot,
I have almost the same question but using the Repeater Field.
The Repeater Field slug is “membres_du_groupe” and inside there is the user “membre”.
The issue is that the post_meta is like :
membres_du_groupe_0_membre
membres_du_groupe_1_membre
membres_du_groupe_2_membre ...
Could you help me with this?
Thanks very much