I have a grid with the possibility to add grouping by dragging and dropping. 

In the IAM I configured the user preference to: COMPLETE

If I add the header email to the grouping, it groups correctly. 

But as soon as i go to the details and go back the grouping disapears, whcih leads to a bad user experience. 

I'd expect this to be saved ias a user prefrence. 

Is this a bug? Or a request for improvement?