only one of multiple petition text attributes is saved

The UI allows an administrator to configure the attributes for an enrollment flow so that there is more than one attribute with Attribute class "Petition" and Attribute name "Text Field (Petition Use Only)".

When the form is submitted, however, only one of the multiple Text Field values is saved to the petition.

This is because each of the form fields has

name="data[CoPetitionAttribute][textfield]"

I cannot find any documentation in the wiki to determine if multiple Text Field attributes are supported.

Either multiple Text Field attributes should be supported or the UI should not allow the admin to configure multiple text field attributes for the enrollment flow.