Epic: Can't remove newly created child epic

Summary

When you create a new child epic, you cannot remove it before refreshing the page

Steps to reproduce

1. Click on Create new epic
2. Create epic
3. Click on X to remove new epic (nothing happens)
4. Click on X again (get alert)
5. Confirm (nothing happens)

If you refresh the page you can then remove the epic.

Example Project

Any epic on gitlab.com