Burndown insights include subtask estimates

Issue Summary

Estimates for completed subtasks are included in the Burndown chart in Insights (they should not).

Steps to Reproduce

In a Scrum project (company-managed or team-managed):

1. Create a parent issue
2. Add a few subtasks under the parent issue, and add story points estimates to the them
3. Pull the new issues in a new sprint
4. Start the sprint
5. Move a subtask in the last column ("Done")

Expected Results

The Burndown chart should not include subtasks estimates in its calculations.

Actual Results

Estimates for completed subtasks are included in the Burndown chart. This behaviour is inconsistent with the Sprint progress, which correctly doesn't count subtasks.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available