File -> Download As -> Microsoft Excel (.xlsx), uploaded the file to Excel Online and saw my G-Sheet converted almost perfect. My main chart was clear.

Since then MSFT or GOOG made some changes that now I don't get the conversion working anymore.

Is it on purpose? Competition?

I decided to try to use Zoho as mediator to accomplish the conversion.

But it does not go anywhere, because on Zoho Sheet I don't receive my main chart, only the image of other chart.