I have gone through the process of creating a sprint, dragging issues into the sprint from the backlog, and then clicking start sprint.
Despite having around 20 or so issues dragged into the new sprint, when I click to start sprint, the modal say 0 issues in sprint.
I tried creating the sprint anyway - the new sprint was empty and all tasks had been returned to the backlog.
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Has anyone else had this issue? If so did you manage to find a solution?
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Edit: I have also tried dragging tasks from backlog into the new empty sprint. I am asked to confirm that I want to edit the sprint, and afterwards I try navigating to the sprint board and it is still empty. All tasks again returned to the backlog.