I have an API that returns one and unique row. In the response line I have two list type fields. I display the line correctly, and for the list type fields I display them in repeating groups.
The problem is that, the repeating group does not display anything when the field (list) element contains only one value.
thank for help 
I suspect the API to return two different payload depending on how many item is returned. You may need to manually merge both payload and use conditionnal to display one item or a list of item