Issue Summary

The Sprint field value is removed on specific transition when using jira.issue.editable = false workflow property and Issue Closed event.

Steps to Reproduce

1. Create a board
2. Create a sprint (but do not start it)
3. Create an issue on the board and assign it to the Sprint
4. Configure a workflow with the jira.issue.editable = false property on the closed status
5. Configure a post-function to trigger the Issue Closed event on the close transition
6. Trigger the Close transition
7. The Sprint field will be removed from the issue entirely. This does not happen when you have any other event configured, or not the editable property set up

Expected Results

Sprint field value remains as is.

Actual Results

Sprint field value is removed upon transition.

Workaround

Update the workflow post-function to use 'Issue Resolved' event.