focus event not working for select2 search text box?

focus event not working for select2 search text box?

I have a website that uses select2 and jquery 3.3.1. When opening a select2 dropdown, the search-textbox receives the focus so that it's easy to start searching. On mobile devices, this is annoying because it makes the virtual keyboard popup. A workaround I found is the following:
  1.             $(document).ready(function () {
  2.                 window.select2typing = false;

  4.                 $(document).on("focus", ".select2-search__field", function () {
  5.                     if (window.select2typing == false) {
  6.                         $(this).blur();
  7.                     }
  8.                 });

  10.                 $(document).on("click", ".select2-search__field", function () {
  11.                     window.select2typing = true;
  12.                     $(this).focus();
  13.                 });

  15.                 $("select").on("select2:close", function () {
  16.                     window.select2typing = false;
  17.                 });

  19.             });
This works fine in jquery 3.3.1 but when I upgraded tot 3.4.x it stopped working because it seems like the focus event is not working anymore. Is this a known problem? I downgraded tot 3.3.1 again for the time being...