No, the system records the user's unique ID at the time they made the change. Removing or renaming a user breaks the link in the history. I think there's an issue logged with Atlassian to cover renames somewhere, but I don't have it bookmarked.
I'm having this issue also with renamed users. The documentation on user keys does mention that they should not be exposed, instead the username should show. https://developer.atlassian.com/jiradev/latest-updates/developer-changes-for-older-jira-versions/preparing-for-jira-6-0/renamable-users-in-jira-6-0#RenamableUsersinJIRA6.0-Whentousethekey,whentousetheusername Is there any issue in to fix this display?
I am also seeing this issue and it's causing some weirdness when we're trying to do LDAP queries with the JJupin plugin.
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