Thanks John, and no I’m not working with a nested repeater.
This repeater is in a tab, there’s no particular extra-settings.
You maybe have a beginning of a solution. If I echo the repeater, I get nothing. If I var_dump the repeater, I get NULL. But, I can iterate on it and get all the values.
It was a mistake by my side. I forget to set the ID in the get_field. In my case I need to pass the ID of a post and I missed this one because I don’t need to specify it in the while statement.