I made template with two TextBoxes.

I opened this template by XLSRW 6.036 and wrote null to the cell A1. The result is readable - OK .
I made next template from the first one with one change - I made them to the group.

I opened this template by XLSRW 6.036 and wrote null to the cell A1.
The result is unreadable.

The templates and results are at http://www.genet.cz/kohout/xlsrw/201805 ... xample.zip to download.
Josef Kohout