Macros that output STYLE tags inside the HTML body generate wiki syntax garbage

Follow this steps to reproduce:

• edit a page in WYSIWYG mode
• switch to source tab and set the content to

  {{html clean="false"}}
  <style type="text/css">
  .test {
    color: red;
  }
  </style>
  <div class="test">This is a test.</div>
  {{/html}}
  

• switch to WYSIWYG tab; the style is correctly applied
• switch back to source tab

The result is:

~/~/
\\.test {
  color: red;
}
\\~/~/

{{html clean="false"}}
<style type="text/css">
.test {
  color: red;
}
</style>
<div class="test">This is a test.</div>
{{/html}}