would spilling of jiras from one sprint to another at the closure of the sprint cause churn?

[Wupadrasta Subbarao]

would spilling of jiras from one sprint to another at the closure of the sprint cause churn?

[Nic Brough -Adaptavist-]

No, issues spilling over from one sprint to another just means that your team is getting something wrong or have had an unanticipated problem during the sprint.  Churn happens when you are not planning properly.