I added an issue to my sprint from my backlog, but after I refresh the page, the issue is back in the backlog. I checked the details of the story and it says that it belongs to sprint 5, but it is not visible when I go see my sprint. It always keeps returning to the backlog.
Yes, Sprint 5 is an active sprint. I drag it to the sprint, it gives me the warning "You are about to change the scope of the sprint". I confirm it, and it is in Sprint 5. However, when I refresh the page or navigate somewhere else, it is moved back to the backlog list. The weird thing is that when I view the details of it, it says it belongs to Sprint 5.