Summary

When trying to export SLA values to Excel after disabling the Dark feature sd.sla.improved.rendering.enabled to revert the SLA rendering format (as explained on How To Revert The SLA Rendering Improvement Changes), Microsoft Excel displays #VALUE! for negative SLA values. This does not happen on OpenOffice.

Steps to Reproduce

1. Follow the workaround suggested in this article: How To Revert The SLA Rendering Improvement Changes
2. Try to export SLA values using the Excel export option through the Issue Navigator
3. Check that the negative SLA values are displayed as #VALUE!

Since Atlassian provides a workaround to disable the new rendering, Jira should be able to export the negative SLA numbers in a proper way as well.