SearchBuilder with Button Initialisation and Bootstrap 4 problem

Link to test case: http://live.datatables.net/cadotula/1/edit
Debugger code (debug.datatables.net):
Error messages shown: No error message
Description of problem: Hello,

If you have a look to the test case, when clicking on "Search Builder" button, you can see that the opened window is anormaly shifted to the left.

If you replace in the code

    dom: "<'row'<'col-2'l><'col-7 text-center'B><'col-3'f>><'row'<'col-5'i><'col-7'p>><'row'<'col-12'tr>><'row'<'col-sm-5'i><'col-7'p>>",

by

    dom: "Bfrtip",

It works as expected.

What's wrong with my code?

Thank's in advanced for your help and have a nice day.