Feature fields inherit values from Release fields

When I move a Feature to a Release, I'd like to have some Feature fields inherit their values from Release fields. For instance, when I assign a Feature to a Release, I want the external release date of the Release put into the Feature's "Release Date" custom field which I have mapped to a field in Jira. Currently when drag-and-dropping Features into Releases I have to go back and hand or bulk edit all the Features to make the fields match.