Show hide headermenu can not scroll

Hi,

I set scrolling for header menu not working on version 6.x but working for older version 4.x
is it a bug ?

   headermenu: {
            height: 100,
            scroll: true
        },

https://snippet.webix.com/b5uwc285

Oh sorry for new version should add

autoheight:false,

I just see the comment below there are same issue
https://docs.webix.com/datatable__headermenu.html#disqus_thread

Thanks.