Creator Kit - DetailsList choice columns

[YAYA]

Hi 

I have a detailsList imported from creator kit. it works normally, but when I add a custom column, All my choices column appears as below and not showing just the values! 

here is my items function:  AddColumns('Letters List url', "action", If( From.Value = varUser.department, "OUT", "IN"))

once I remove AddColumn function, it works normally. is there any solution for this, if not is there any workaround . I just need a column to show IN OUT according to from column.

Thanks