In issue's description, using 'me' for a quick action doesn't work with multiple user names

Summary

Typing a quick action for assigning an issue to multiple users including 'me' will not assign the issue to myself - only to the other users.

Steps to reproduce

1. Use Gitlab.com with minimum of bronze account (multiple assignees is a Starter feature).
2. Create a new issue.
3. In the issue's description, type /assign me <username> (as username mention any user that is not yourself).
4. Save.

What is the current bug behavior?

Only the other user is assigned on the issue.

What is the expected correct behavior?

Both yourself and the other user are assigned on the issue.

Output of checks

This bug happens on GitLab.com