Posted 26 March 2021, 1:36 am ESTHi,
Using Documents 4.0.3 to convert excel template to json and opening it in SpreadJS 14.0.6. The row groupings should be collapsed but they are expanded in SpreadJS. And also if you open excel file (saved from Documents) in SpreadJS the collapsed groupings are expanded. So might be also SpreadJS issue. Opening excel file in Excel shows that groupings are collapsed. Attached excel file and json file.