Epic Report does not show the correct values at the graph depending on how the epic link was created

Issue Summary

While the Summary of the issues does show the correct values for Total, completed, unestimated issues, and the total of Story Points and done points, the graph does not show the represent the same values.

Note: Issue was not reproduced using Jira 7.13.8

Steps to Reproduce

a) Create a new project SCRUM
b) Create a new Epic, Epic8393
c) Create a new Story using the Create button, called Story 8395 and add a link to the Epic8393;
d) repeat for Story8396, Story8397, Story8398, Story8399, Story8507, Story8508
e) Create a new Story 5200 using the Create button, but do not add a link to the Epic8393
f) Open the Backlog board - you will see the Epic8393 with 7 stories
g) Click over each story to open the quick edition at the right side and estimate the stories:
story5200 - 3
story8395 - 8
story8396 - 5
story8397 - 8
story8398 - 13
story8399 - 8
story8507 - 8
j) Edit story5200, search for the field "Epic Link", select the field, add the link to Epic8393, transition the issue to "done"
k) Edit story8396 and transition the issue to "done"
l) Open the Epic Report.

Expected Results

Actual Results

Workaround

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