Pagination in dataTable 1.10.*: dont reset container on change current page

I use bootstrap4 styling and append class pagination-sm to pagination container in initComplete callback (i dont find other solutions), but when i change current page pagination container reset and display without pagination-sm.Yes, i can add other callback on redraw, but it's not so useful - need reset elements in container.
https://cdn.datatables.net/v/bs4/dt-1.10.20/b-1.6.1/fh-3.1.6/datatables.min.js