I have a grid that ist grouped by column A. I also use the ColumnChooser on the Grid

(mygrid.ShowColumnChooser(string))

In the choose Column A is showen but not selectable.

I have Version 9.1 incl hotfix.

In a earlyer Version this whas working.

What I need is to Group by a column an also show that column in the 'normal' Column. In the best case by selecting it in the ColumnChooser.

Any idea how to do this?