ember-bootstrap >= 2.1 submit bubbling problem

components.my-form.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  submit: () => {},
  
  actions: {
   
    bubbleStop() {
    },
    
    submitMyFormAction() {
      
      console.log('action submitMyFormAction');
      
      	this.submit({
        	name: this.input_name.trim().toUpperCase()
      	});
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  actions: {
    
    modifyMyModel(hash) {
      
      console.log('action modifyMyModel with argument', hash);
      this.set('cookedInput', hash.name);
    }
  }
});

templates.application.hbs

<h1>ember-bootstrap >= 2.1 native submit event bubbling problem</h1>
<br>
<br>
{{outlet}}
{{my-form submit=(action 'modifyMyModel')}}
<p>
result (input trimmed & uppercased): {{cookedInput}}
</p>
<br>
<br>

templates.components.my-form.hbs

<p>

	bs-form won't stop native submit event from bubbling:
	{{#bs-form onSubmit=(action "submitMyFormAction")}}
	{{input value=input_name}}
	<button type="submit">Submit</button>
	{{/bs-form}}
</p>

<p>
	with bubblestop:

	<div {{action 'bubbleStop' on='submit' bubbles=false}}>
		{{#bs-form onSubmit=(action "submitMyFormAction")}}

		{{input value=input_name}}
		<button type="submit">Submit</button>
		{{/bs-form}}
	</div>
</p>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2",
    "ember-bootstrap": "2.6.0"
  }
}