Gutenberg blocks with invalid content

invalid-content-blocks.html

<!-- wp:image -->
<div>
<!-- /wp:image -->

<!-- wp:video {"id":683} -->
<div>
<!-- /wp:video -->

<!-- wp:heading {"level": 2} -->
<div>
<!-- /wp:heading -->

<!-- wp:paragraph -->
<div>
<!-- /wp:paragraph -->

<!-- wp:nextpage -->
<div>
<!-- /wp:nextpage -->

<!-- wp:code -->
<fragment/>
<!-- /wp:code -->

<!-- wp:more -->
<div>
<!-- /wp:more -->

<!-- wp:list -->
<div>
<!-- /wp:list -->