Sprint assignments don't show up in the commit dialog for issues that are assigned to closed sprints

Steps to reproduce

1. Create a board with 2 sprints and 1 story
2. Move the story into the first sprint. Start the sprint.
3. Close the sprint. The story should now be in the backlog
4. Create a Portfolio plan based on the board
5. Assign the issue to the board team. Commit.
6. Assign the issue to the second sprint.
7. We see "1 Uncommitted change" at the top. Click the button

Expected:

• We see the issue's sprint assignment in the commit dialog

Actual:

• No changes are shown

Workaround

There are 2 workarounds:

1. Change the issues team to calculate, then change it back to the proper team. Then assign the sprint. Then commit the issue.
2. Assign the issue to a sprint manually inside JIRA. The commit dialog should then show the uncommitted change of the issue's sprint.