Problems with datatables callback on pagination

FireFoxII

I'm implementing switchery into datatable in this way

  var table = $('#table').DataTable({
        pageLength: 25,
        responsive: true,
        deferRender: true,
        stateSave: false,
        info: false,
        ordering: false,
        dom: 'lTfgt<"float-left"i>p',
        ajax: {
            "url": "../src/routes.php",
            "type": "POST",
            "async":true,
            "dataType": "json",
            "data": function(d) {
                d.call = "data-vol";
                d.dataform = $('#filtroForm').serialize();
                d.market = JSON.stringify($('#jstree_topmarket').jstree("get_selected"));

                return d;
            }
        },
        language: {
            "url": "assets/js/plugins/dataTables/it_IT.txt"
        },
        "fnDrawCallback": function() {
            var elems = Array.prototype.slice.call(document.querySelectorAll('.js-switch'));

            elems.forEach(function(html) {
                var switchery = new Switchery(html, { size: 'small' });
            });
        }
    });

and seems ok

but when I switch to page 2 and then come back to page 1, I have this result

Replacing fnDrawCallback with initComplete seems not working

kthorngren

In the switchery docs see the section Multiple calls to skip already checkboxes that already have switchery applied. If this doesn't help please build a test case so we can take a look at that is happening.
https://datatables.net/manual/tech-notes/10#How-to-provide-a-test-case

Kevin