The "Additional level of childrens" option while export CSV is generating empty excel file.
When trying to export csv (/mnt/overlay/wcm/core/content/sites/createcsvexport.html/content) for the list of projects under /content, the excel is generating properly with depth field set to "Direct children only".
But when I am using the option "Additional level of childrens" with 1 or 2 or 3 level, an empty excel is generated with headers only with no content.
I have tried this on AEM version 6.5.9.0 and also with 6.5.20.0. both are not working.
Any one have any idea where to look for the resolution?

The problem is only coming for path /content. If we select any project path like /content/project1, then the csv report is generating properly.