Bulk Edit in Issue Type is making Epics Unlabelled

Summary

Bulk Edit in Issue Type is making Epics Unlabelled in the Agile Board.

Environment

• JIRA 6.4.12
• JIRA Agile 6.7.11

Steps to Reproduce

1. Perform a JQL search to bring any Story Issue Type from one specific project.
2. Click to Bulk Edit the result and select 2 of them.
3. Change the Issue Type to Epic.

Expected Results

It should ask for the Epic Name field or at least leave the original Summary of the issue as Epic Name.

Actual Results

When going to the Scrum Board showing the Epics of that project, all the new Epics (changed in this process) are showing the unlabelled text.

Notes

If you perform a bulk Move instead Edit, you will be prompted to set an Epic Name and the same Epic Name will be used for all issues moved.

Workaround

Edit those issues one by one.