Ember CP Validations - Disabled Bug

controllers.application.js

import Ember from 'ember';
import { buildValidations, validator } from 'ember-cp-validations';

const Validations = buildValidations({
  'something.stepOneValue': validator('presence', {
    presence: true,
    disabled: Ember.computed.not('model.isStepOne'),
    message: 'stepOne value cannot be blank'
  }),
  
  'something.stepTwoValue': validator('presence', {
    presence: true,
    disabled: Ember.computed.not('model.isStepTwo'),
    message: 'stepTwo value cannot be blank'
  }),
  
  'something.stepThreeValue': validator('presence', {
    presence: true,
    disabled: Ember.computed.not('model.isStepThree'),
    message: 'stepThree value cannot be blank'
  })
});

export default Ember.Controller.extend(Validations, {
  appName: 'Ember Twiddle',
  showErrors: false,

  isStepOne: Ember.computed.equal('step', 1),
  isStepTwo: Ember.computed.equal('step', 2),
  isStepThree: Ember.computed.equal('step', 3),
  
  actions: {
    moveStep(direction) {
      if (direction === 'next') {
        this.incrementProperty('step');
      } else {
        this.decrementProperty('step');
      }
    }
  }
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  setupController(controller, model) {
    controller.setProperties({
      model: model,
      something: Ember.Object.create({
        stepOneValue: null,
        stepTwoValue: null,
        stepThreeValue: null
      }),
      step: 1
    });
  }
});

templates.application.hbs

{{#if isStepOne}}
  {{boostrap-cp-form
    property="something.stepOneValue"
    propertyValue=something.stepOneValue
    placeholder="Step One Value"
    moveStep=(action 'moveStep')
    step=step
  }}
{{else if isStepTwo}}
  {{boostrap-cp-form
    property="something.stepTwoValue"
    propertyValue=something.stepTwoValue
    placeholder="Step Two Value"
    moveStep=(action 'moveStep')
    step=step
  }}
{{else}}
  {{boostrap-cp-form
    property="something.stepThreeValue"
    propertyValue=something.stepThreeValue
    placeholder="Step Three Value"
    moveStep=(action 'moveStep')
    step=step
  }}
{{/if}} 

<div>
  isValid: {{validations.isValid}}<br>
  <ul>
    {{#each validations.errors as |error|}}
      <li>
        {{error.message}}
      </li>
    {{/each}}
  </ul>
</div>

<button {{action 'moveStep' 'next'}}>
  Next
</button>

<button {{action 'moveStep' 'back'}}>
  Back
</button>

templates.components.bootstrap-cp-form.hbs

<h1>
  Step {{step}}
</h1>

<h2>
{{property}}: {{propertyValue}}
<h3>
  
{{#bs-form formLayout="horizontal" model=this onSubmit=(action moveStep) as |form|}}
  {{form.element controlType="text" placeholder=placeholder property=property}}
  {{bs-button defaultText="Submit" type="primary" buttonType="submit"}}
{{/bs-form}}

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.12.2"
  },
  "addons": {
    "ember-cp-validations": "3.5.3",
    "ember-bootstrap": "1.2.2",
    "ember-bootstrap-cp-validations": "1.0.0"
  }
}