Sprints Can't be Ended when their Board Have Been Deleted

When a JIRA Agile board is deleted, all sprints that are active on it cannot be deleted nor can reports from them be viewed.

Steps to reproduce:

• Create a new Scrum Board
• Create a sprint on the board and add issues.
• Start the sprint.
• Delete the board.
• Sprint stays active and cannot be ended and report page is blank.

Can we rather show a notification warning customer they have an active running sprint when deleting the board or prevent them from deleting the board?

Workaround

• Create a new board.
• Associate the filter of deleted board to new board.
• You can now end sprint from this board.

Is the above the expected behaviour?