Hi Dimitar,
The grid header that contains the column names should flow within the groups.
For instance, if I am grouping my data with a column name “City”.
“City” should be displayed in the first row followed by the groups like “City: Berlin, City: London”. After expanding groups, the column headers should be displayed within the groups itself not before the groups.
Please let me know if you need more information.
P.S.: Can I attach an image to my post? I can share a screenshot.
Thanks,
Ambika