Code snippet: http://webix.com/snippet/5fa30b5c
Press the Group button then try to sort the Year and Film Title columns.
If you try to sort a column with sort:‘int’ (Year), it sorts properly. However, if you sort a column with a sort:‘string’ (Film title) the group footer/row goes to the top of the group instead of keep at the bottom, which it does in the sort:‘int’.
Edit: also noticed that if I keep sorting the Film Title column, it will always show a different sort order every time I press it.
This also happens for custom sorts.
Is this working as intended or is it a bug? If so, is there any fix at the moment?