Externally linked epics won't generate a swim lane

On my Scrum or Kanban board I'm using the functionality to generate swim lanes using Epics.

It works for locally created epics but not for the one linked from an external project.
Swim lanes and tasks using external epic links are not being displayed on the board at all... look at screenshot 1.

So basically the functionality is useless for us, as we want to store all the epics in a separate project for tractability purposes.

A similar issue is visible on the Scrum Backlog planning board - for all the externally linked epics the label is not generated - screenshoot 2.

It is related with https://jira.atlassian.com/browse/JRA-34243