Custom values in onServerSearch are not respected about virtual-select

[MichalLauer]

I was not able to identify what exactly causes the issue, but a temporary solution is to replace the virtualSelect.setServerOptions(newOptions); call with the same code but exclude this.setVisibleOptionsCount(); calls.

So instead of

function searchLabel(searchValue, virtualSelect) {
  ...
  virtualSelect.setServerOptions(newOptions);
}

I used

function searchLabel(searchValue, virtualSelect) {
  ...
  // --
  /** merging already selected options details with new options */
  if (selectedOptions.length) {
    const newOptionsValueMapping = {};
    optionsUpdated = true;

    newOptions.forEach((d) => {
      newOptionsValueMapping[d.value] = true;
    });

    selectedOptions.forEach((d) => {
      if (newOptionsValueMapping[d.value] !== true) {
        // eslint-disable-next-line no-param-reassign
        d.isVisible = false;
        newOptions.push(d);
      }
    });

    virtualSelect.setOptionsMethod(newOptions, true);
  }

  if (optionsUpdated) {

    if (virtualSelect.multiple) {
      virtualSelect.toggleAllOptionsClass();
    }

    virtualSelect.setValueText();
  } else {
    virtualSelect.updatePosition();
  }

  function removeServerSearchingClass($allWrappers) {
    // Convert $allWrappers to a jQuery object
    const $jqueryAllWrappers = $($allWrappers);
    $jqueryAllWrappers.removeClass('server-searching');
  }

  removeServerSearchingClass(virtualSelect.$allWrappers);
  virtualSelect.visibleOptionsCount = ...; // manually compute the number of visible items
  virtualSelect.afterSetVisibleOptionsCount();
  // --
}