splitAt messes up headers and footers?

When I’m using splitAt, and I hide columns, the header/footers get shifted to the right when the column disappears.

Does splitAt not work with header and footers, does it work with groupBy (since groupBy hides columns as a side effect)?

Also, when I say header I am referring to the optionally attached ones (such as the header that is used with groupBy)

What version of dhtmlxGrid do you use? Please open ticket at support.dhtmlx.com/ and provide us working example where we can reproduce it.