switchClass() removes class if removeClass and addClass params are the same

[gtasker10]

I am using jQuery 3.6.0. Seems to be an undocumented "feature" with switchClass(). If I specify the same class to remove and then add, I get no class. In the following example, I would expect to see class="big":

   <input type="text" id="myInput" class="big"></input>
   <script>
      $(document).ready(function () {
         $("#myInput").switchClass("big", "big");
      });
   </script>

The above generates:

<input type="text" id="myInput" class="">

[mgol]

Thanks for the report. Does the issue you describe exist when jQuery UI 1.12.1 is used or only with jQuery UI 1.13.0 or newer?