Sprint Burndown chart - why I see Epic as a content added to sprint?

Question

I expect to see that content changed in sprint due to Story Task or Bug , but why I'm seeing Epic as a content change ? and the story points are the all open stories under the Epic, while only 1 Story is assigned to this sprint. (Our hierarchy is : Epic - Story/Task/Bug - Subtask) .

Sari Kachorovsky · Accepted Answer

I think I found the reason, this epic was in the past Story and was shifted to be a Epic, As a Story it received Story Points (which Epic don't get). Maybe that is what triggered it to be in the burndown chart.

Sari Kachorovsky · Accepted Answer

The problems was that when the issue was a story the Sprint field was filled up. When it was changed to Epic, the sprint field no longer exist in the screen, but the Sprint field for this ticket is still alive and every time I opened and close sprints it moved the Epic to a new sprint and showed it in the Sprint reports.
I've added the sprint field to the pic screen, deleted the sprint from it, and I guess that from now on I will not see it in the reports.