button ignores disabled attribute

controllers.application\.js

import Controller from '@ember/controller';

export default Controller.extend({
  actions: {
    foo() {
      alert('clicked');
    }
  }
});

templates.application\.hbs

<p>
  ember action
  <button {{action "foo"}} disabled>not clickable</button>
  <button {{action "foo"}} disabled><span>yellow span is clickable!</span></button>
</p>

<p>
  vanilla:
  <button disabled onclick="alert(1)">
    <span>not clickable</span>
  </button>
</p>

<style>
  button > span {
    background: yellow;
  }
</style>

tests.test-helper\.js

import Application from '../app';
import config from '../config/environment';
import { setApplication } from '@ember/test-helpers';
import { assign } from '@ember/polyfills';
import { start } from 'ember-qunit';

let attributes = {
  rootElement: '#test-root',
  autoboot: false
};
attributes = assign(attributes, config.APP);

let application = Application.create(attributes);
setApplication(application);

start();

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": false
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-template-compiler": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}