I am trying to implement the JMWE post function for copying fields from an Epic to Story. We would like users to input fields into the epic, and have them carry down automatically on create of a story.
Our post functions appears as follows: 
We are then creating the Story from the epic panel of the epic ticket:

Currently, none of the fields are being copied down to the story. Ticket creates successfully, with no errors. I also see the newly created issues in the "Issues in Epic" panel on the original epic and can see the new issues when querying ""Epic Link" = DP-4".
I have tried moving the "Creates issue originally" to after the post function and still no luck.
One thing to note, is there is not a Jira link for Epic, but I'm not sure that matters: 