Steps to reproduce:

1. Create a username called unassigned
2. Create an issue and assign it unassigned user and another issue (leave it Unassigned)
3. Create a SCRUM/Kanban board
4. On JIRA Agile board, click on the issue that is not assigned to any user

Expected Result:

• On the card, the assignee should be empty

Actual Result:

• On the card, the assignee is the unassigned user