Time Since Chart macro is faulty in Confluence

Summary

Time Since Chart that has been added in Confluence as External Gadget does not shows the chart. In the contrary, it works fine in JIRA.

Steps to reproduce

1. Add Time Since Chart in JIRA dashboard. Make sure that it works fine.
2. Copy the Gadget Specification URL of the Time Since Chart in JIRA and add it into Confluence Admin >> External Gadgets
3. Create a new page in Confluence and add the macro from the macro browser.

Diagnosis

• This behavior only affects Time Since Chart macro from JIRA 6.0.8. The macro from JIRA 6.0.4 works fine.
• Tested on Confluence 5.1.4 and 5.2.3.

Screenshot