'Sprint Burndown Gadget’ Macro Does Not Render Chart Correctly

Summary

When inserting the 'Sprint Burndown Gadget’ in a Confluence page, the chart does not render correctly. Before it used to render the chart fully and on first load.

Environment

Confluence 5.9.1-OD-2015.45.1-0006

Chrome Version 46.0.2490.80 (64-bit)
Firefox 42.0
Safari Version 9.0.1 (11601.2.7.2)

Steps to Reproduce

1. Create a sprint with issues that have story points
2. In Confluence, create a page and insert the Sprint Burndown Gadget

Expected Results

Insert macro and the chart renders correctly on first load.

Actual Results

Chart does not render correctly. Sometimes the chart is cut in half or does not load when first visiting the page.

The following error is displayed in Chrome console

Uncaught TypeError: Cannot read property 'renderReopenButton' of undefined

The following error is displayed in Firefox console

TypeError: h is undefined

The following error is displayed in Safari console

TypeError: undefined is not an object (evaluating 'h.renderReopenButton')

Workaround

Click the cog > Refresh