The pullquote block outputs nested paragraphs

[afercia]

When inserting a Pullquote block the produced output contains nested paragraphs.
Just insert a Pull quote and the initial markup will be something like:

<!-- wp:core/pullquote -->
<blockquote class="wp-block-pullquote alignnone">
    <p>
        <p>Pull quote content</p>
    </p>
    <footer>Pull quote caption</footer>
</blockquote>
<!-- /wp:core/pullquote -->

Save, and navigate away, then re-open the post in Gutenberg (or just refresh the page). TinyMCE will try to fix the markup. This will end up in something like:

<!-- wp:core/pullquote -->
<blockquote class="wp-block-pullquote alignnone">
    <p>
    </p>
    <p>Pull quote content</p>
    <p></p>
    <footer>Pull quote caption</footer>
</blockquote>
<!-- /wp:core/pullquote -->

Additionally: seems the empty paragraphs above are preserved in Gutenberg. However, when I try this:

• navigate away and re-open the post in the classic editor - visual mode
• save or switch to text mode then back to visual
• the markup will change in something like this:

<!-- wp:core/pullquote -->
<blockquote class="wp-block-pullquote alignnone">Pull quote content

<footer>Pull quote caption</footer></blockquote>
<!-- /wp:core/pullquote -->

• save and navigate away
• re-open the post in Gutenberg
• now the pullquote content has disappeared, the markup will be something like this:

<!-- wp:core/pullquote -->
<blockquote class="wp-block-pullquote alignnone">
    <footer>Pull quote caption</footer>
</blockquote>
<!-- /wp:core/pullquote -->