Listbox Grouping Bug?

asked 2017-04-24 14:49:11 +0800

IngoB
256 ● 6

Hi,

I got a listbox with two columns, the first one is hidden. If I try to group the second column, nothing happens. If a set the first one visible, it all columns are grouped.

It only seems to appear if the first column is invisible. Is this a bug?

zkfiddle.org

P.S.: I use the listheader for grouping.