Username confirmation triggers password autocomplete on Safari

When deleting an account the username confirmation field triggers password autocomplete on Safari

<input name="username" type="text" autocomplete="off" class="form-control" id="__BVID__43">
<div pseudo="-webkit-textfield-decoration-container">
   <div>
      <div contenteditable="plaintext-only"></div>
   </div>
   <div pseudo="-webkit-credentials-auto-fill-button" role="button" aria-label="password AutoFill" style="display: none !important;"></div>
</div>
</input>