[wp-trac] [WordPress Trac] #51096: Meta boxes hooked on 'edit_form_after_title' don't appear on block-editor page

[WordPress Trac]

#51096: Meta boxes hooked on 'edit_form_after_title' don't appear on block-editor
page
--------------------------+---------------------
 Reporter:  apedog        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  5.9
Component:  Editor        |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
--------------------------+---------------------

Comment (by costdev):

 Can someone clarity this issue for me?

 The following in `functions.php` shows a metabox at the bottom of the
 Gutenberg block editor when adding a new post and editing an existing
 post.


 {{{#!php
 <?php

 function add_metabox_using_edit_form_after_title( $post ) {
         add_meta_box(
                 'a-meta-box',
                 'A Meta Box',
                 'render_a_meta_box',
         );
 }

 function render_a_meta_box( $post ) {
         ?>
         <h1>Hello World!</h1>
         <?php
 }

 add_action( 'edit_form_after_title',
 'add_metabox_using_edit_form_after_title', 10, 1 );

 }}}

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Ticket URL: <https://core.trac.wordpress.org/ticket/51096#comment:5>
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