This changes how a number is computed. Your charts can move without your data moving. Each change is named below with the reason for it.
What changed. The Average, Median and Trend lines on the sprint-by-sprint charts (Velocity and Time Tracking) are now worked out from finished sprints only. A sprint that is still running, or has not started, no longer counts.
Why. A sprint that started this week has delivered only a few days of work, and a sprint that has not started has delivered nothing. Counting them as if they were finished pulled these lines down, so a normal team looked slower than it is.
What moves. When your date range ends after today, the Average, Median and Trend lines can rise, because the near-empty sprints at the end are no longer counted. When your range ends in the past, nothing changes.
What does not move. Each sprint's own value, the Rolling Average for finished sprints and the KPI cards are calculated as before.