[Dropdown] "refresh" and "refreshItems" are not working

[smartm0use]

Hello, I need to change an option status after an async call but I can't get it updated in the dropdown.

$('select').dropdown();

setTimeout(() => {
   $('select option[value="3"]').attr('disabled', true);
   $('select').dropdown('refreshItems');
}, 3000);

I have to use destroy and then reinstantiate it to make it working:

$('select option[value="3"]').attr('disabled', true);
$('select').dropdown('destroy');
$('select').dropdown();

Here is a JSFiddle: https://jsfiddle.net/6y8d4qxo/2/

Is anything wrong with my usage?

[lubber-de]

This is a bug, because the select observer should detect changes to the select tag and recreate the menu automatically.
Unfortunately it did not detect attribute changes to option tags.

I fixed this by #2034
See https://jsfiddle.net/lubber/hjdv6bnL/9/

[smartm0use]

I see, so I was wrong posting it here as discussion instead of issue.
Thank you for your prompt fix!