Issue Summary

User mention is not correctly converting user name accountid:XXXXXXXX in old issue view, however, it is working as expected in New view.

Steps to Reproduce

1. Create a user with Full name as myname[company]
2. Mention user myname[company] in comments through old issue view
3. User name will not be converted correctly

Expected Results

The user name should appear like myname[company] in the old view as well.
refer to the below screenshot

Actual Results

The user name is appearing in text format like [myname[company]|~accountid:5xx in old-view.

Workaround

After selecting a user with a name in this format, it will paste text like this into the editor:

[Display name [Company]|~accountid:abcde]

Before saving, edit the text to remove the brackets from the display name, but keep the value to the right of "accountid" intact.

[Display name Company|~accountid:abcde]

When the text is saved, it only looks at the account ID value to work out who you are mentioning. When that text is displayed again, it looks up the display name each time (so that the privacy preferences for the person being mentioned can be observed), and so the correct display name will be shown.