Steps to Reproduce:

1. Create a scrum project
2. Have a board with at least one unmaped status
3. Start a sprint
4. Move tickets around and set one ticket to that unmaped status
5. Close the sprint
6. Check the Sprint Report

Expected Results:
At Sprint Report the field status should display the actual value of the ticket.

Actual Results:
The Sprint Report is showing the field status with other value.
See:

Add-on Version:
JIRA v7.1.0-OD-02-030
JIRA Agile v7.1.9-D20151208T191112

Notes:
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.