Description of labels cannot show emojis in boards

Summary

The description of labels are not correctly shown in boards when the description contains an emoji. In the Labels page are the emojis rendered but in boards they are just the :emoji_name: text.

Steps to reproduce

1. Create Label with title "Label" and with description :disappointed: Not shown correctly in boards. In Labels page is the description correctly rendered as: "😞 Not shown correctly in boards."
2. Add an issue and assing the created label to it.
3. In Board view hover over the label and see that the description is :disappointed: Not shown correctly in boards. and not:

"😞 Not shown correctly in boards."

Example Project

https://gitlab.com/dustin1358/gitlab-emoji-issue

What is the current bug behavior?

What is the expected correct behavior?

Labels page renders emojis correctly.

GitLab.com

Can be reproduced on gitlab.com and self-hosted instance.