MultiSortMeta case doesn't work well - Datatable

[qmn]

I'm working on sorting for lazy loading datatable. As I see the example for multiple sorting doesn't work: https://www.primefaces.org/primereact/#/datatable/sort

When I handle onSort callback in multiple sortMode it's always return an array multiSortMeta with only one element. How can I handle for multiSortMeta case?