Chart in excel goes away when using it as template and then downloading it

[ivanfemia]

Hi Guys.
We have been using this tool successfully in our project since the past 6 months. Recently there was a requirement to use the excel template to upload to system, change some data, then download back again.
There are 5 worksheets in the excel that is given to us. It is macro enabled, and has some graphs.
We are changing the data of only the 1st work sheet which does not have macro and does not have any graphs. But when we download back the excel, the chart goes away.
Then I tried the standard example ZDEMO_EXCEL29 - it also has the same issue. After download, the chart is not there.
Is this already a known bug, or am I doing something wrong? Please advise. Thanks. By the way, we are on latest version - 6.0.

[ivanfemia]

Chart not yet supported, it will be fixed once we will introduce chart support issue #28

[ivanfemia]

Updating issues (#174, #31, #71, #134, #137, #141, #155, #156, #170, #176, #179, #180, #182)