Add option for “Recipients Can Collaborate” on Attachments field

When using a Template that contains the Attachment field, a user creates a document for esignature and uploads any kind of document to the attachment field. However, when the user then "Assign to Someone Else" the attachments that were uploaded do not carry over to the other user.

There does not seem to be an option to “Collaborate” with the Attachments field.

The end result would be that any attachments the first user uploads carry over and remain attached, so the second user can see them and does not have to re-attach.