I'm a bit stuck on how to properly use the Group Picker (Single Group) custom field through transitions. I have the Custom field created, and have it attached on the proper screen that is on the proper scheme. On the transition that is supposed assign it to the group, I am adding a post function on the create transition "Update Issue Custom Field" as the exact group name. When I create the issue nothing happens. No changes happen. The field is there (not visible, because it's empty), but I've verified it's there on the screens and scheme. This custom field is a little confusing.