BUG: wrong rendering for the builder

[Idaryss]

GrapesJS version

• I confirm to use the latest version of GrapesJS

GrapesJS MJML version

• I confirm to use the latest version of GrapesJS MJML

What browser are you using?

Chrome

Reproducible demo link

https://grapesjs.com/demo-mjml.html

Describe the bug

How to reproduce the bug?

1. ... Import MJML:

<mjml>
  <mj-head>
    <mj-attributes>
      <mj-text css-class="global-text" padding="0px" color="blue"></mj-text>
      <mj-all font-family="Arial"></mj-all>
    </mj-attributes>
  </mj-head>
  <mj-body>
    <mj-section>
      <mj-column>
        <mj-text css-class="global-text">Hello World!</mj-text>
      </mj-column>
    </mj-section>
  </mj-body>
</mjml>

2. ...

Same thing using <mj-class>

What is the expected behavior?
Hello world should be blue as per the mjml.io demo website
...

What is the current behavior?
currently the text is not blue but black
...

If is necessary to execute some code in order to reproduce the bug, paste it here below:

// your code here

Code of Conduct

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