Is it a known Bug that closed sprints will reappear in the backlog?

[Lucas van Gelderen]

For example: 

Sprint 2 | België is closed. This is also seen in the sprint report.

Sprint 3 | Chicago is the active sprint.

In the backlog Below Sprint 3 sprint 2 is also seen.  It looks like it is possible to drag issues into sprint 2.

[Prachi Bolar]

Hi Lucas,

Welcome to the community :) 

Please refer to this : https://community.atlassian.com/t5/Jira-questions/Why-are-some-completed-sprints-still-appearing-in-our-backlog/qaq-p/2539699 For more details.

I suspect it would be one the reason mentioned in the post which you would be facing,

But if still issue exist, request you to reach out to https://support.atlassian.com/ so that the team can further check your instance directly 

Thank you,

Prachi

[Shikha Verma]

Hey, @Lucas van Gelderen, A closed sprint can reappearance in the backlog due to improper closure, indexing issues, browser cache, or potential bugs. If the issue persists, try re-indexing Jira, clearing your browser cache, or contacting Atlassian Support.