Hi there!
I have also noticed the problem. It occurs with the option define(‘EM_GUTENBERG’, true); WP apparently tries to wrap Gutenberg comments with wpautop.
It looks like this:
—
<p><!– wp:paragraph –></p>
<p>BLA FASEL</p>
<p><!– /wp:paragraph –></p>
<p><!– wp:list –></p>
<p><!– /wp:list –></p>
<p><!– wp:separator –></p>
<hr class=”wp-block-separator”/>
<!– /wp:separator –></p>
—
Is there any workaround, something like EM_DISABLE_AUTOP ? ??