Workbooks containing scatterplots cause all charts to be deleted when workbook is saved

Created originally on Bitbucket by tldmdeploy (Brandon Lau)

#!python
from openpyxl import load_workbook
wb = load_workbook('test.xlsx')
wb.save('output.xlsx')

Open output.xlsx and you are presented with the following prompt:

Upon reparing the workbook, all charts are removed and the following XML log file is generated:

#!xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<recoveryLog xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main"><logFileName>Repair Result to output0.xml</logFileName><summary>Errors were detected in file '/Users/brandon/projects/tldm/output.xlsx'</summary><removedParts summary="Following is a list of removed parts:"><removedPart>Removed Part: /xl/drawings/drawing1.xml part.  (Drawing shape)</removedPart></removedParts></recoveryLog>

Attachments: test.xlsx