Labels in system messages of epics are broken

Summary

Labels in system messages of epics are shown as internal ID numbers.

Steps to reproduce

See epic 122 - Create and manage a team in GitLab with broken labels.

Example Project Group

See the gitlab-org group and it's epics.

What is the current bug behavior?

It shows the internal label IDs instead of the label text and its coloring.

What is the expected correct behavior?

Show the label like this: GitLab Premium

Relevant logs and/or screenshots

image

Output of checks

This bug happens on GitLab.com

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)