Combobox Widget - Triangle Drop Down Icon Missing

[gtbird24]

When creating a combobox like so:
$("#Item").combobox();

The created combobox does not have the triangle icon to the right of the combobox to allow users to open the dropdown.

The following span items are automatically created in earlier versions of jquery-ui which display the icon:

<span class="ui-button-icon ui-icon ui-icon-triangle-1-s"></span>
<span class="ui-button-icon-space"></span>

The issue is not that these icons don't exist, but rather that when .combobox() is called against an element, these items are not generated by the code.

Noticing the trend of a developer asking what version this issue started on:
This issue is NOT present in Jquery UI 1.13.2
This issue IS present in Jquery UI 1.14.1