Issue Summary

If a username contains the symbol '#', @user mention will not show the user's full name in an issue, whether in the Description or Comment field.

Steps to Reproduce

1. Create a user with user name 'us#r' and full name 'Test User'.
2. Make sure all permission is granted so @user mention can be used in the issue.
3. Mention [@us#r] in description or comment.
4. Only ~us#r will be shown and clicking the username will not direct to the user's profile.

Actual Results

Only ~us#r will be shown and clicking the username will not direct to the user's profile.

Expected Results

The user full name is properly displayed.

Cause of issue

• When a '#' is used, JIRA will read it as an Anchor Link, thus redirects to http://<jira-url>/browse/<project-id>#r

Workaround

none.