Steps to Reproduce:
- Create a scrum project
- Have a board with at least one unmaped status
- Start a sprint
- Move tickets around and set one ticket to that unmaped status
- Close the sprint
- Check the Sprint Report
At Sprint Report the field status should display the actual value of the ticket.
JIRA Agile v7.1.9-D20151208T191112
It's possible that JIRA is taking the status before the ticket was removed from the sprint to display on the report. Though, it should reflect the actual status of the ticket.