[TOC Block]: The block loses the id after editing the title or heading

[Nickbahson]

Describe the bug When I insert the Rank Math Table of Contents through the Gutenberg editor and don’t edit it at all, it has the following structure:

<div class="wp-block-rank-math-toc-block" id="rank-math-toc">
   <h2>Table of Contents</h2>
   <nav>
    <ul>
      <li>my headings</li>
   </ul>
</div>

However, if I change the text in the headings to anything, the block loses the id=“rank-math-toc” ID attribute part.

To Reproduce Steps to reproduce the behavior:

1. Have a blog post
2. Add the Table of Contents block through the Gutenberg editor
3. Click on the title and change it to anything
4. Observe the missing ID