[wp-trac] [WordPress Trac] #63808: Block hooks are not applied to plugin-registered templates using `register_block_template()`

[WordPress Trac]

#63808: Block hooks are not applied to plugin-registered templates using
`register_block_template()`
--------------------------+-------------------------------------
 Reporter:  iamadisingh   |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Editor        |    Version:  trunk
 Severity:  normal        |   Keywords:  needs-patch 2nd-opinion
  Focuses:                |
--------------------------+-------------------------------------
 Block hooks are not being applied to templates registered by plugins using
 the Template Registration API (`register_block_template()`). This creates
 inconsistent behavior where block hooks work for theme templates and user-
 created templates, but not for plugin-registered templates.

 Originally issue reported in GB:
 https://github.com/WordPress/gutenberg/issues/71139


 == Step-by-step reproduction instructions

 1. Create a plugin.
 2. Add this snippet to register a template and hook a block:

 {{{#!php
 <?php
 register_block_template(
     'my-plugin//plugin-template',
     array(
         'title'       => 'Test Template',
         'description' => 'This is a test template',
         'content'     => '<!-- wp:separator {"className":"is-style-dots"}
 --><hr class="wp-block-separator has-alpha-channel-opacity is-style-
 dots"/><!-- /wp:separator -->',
     )
 );

 add_action(
     'single_template_hierarchy',
     function () {
         return array( 'plugin-template' );
     }
 );

 add_filter(
     'hooked_block_types',
     function ( $hooked_block_types, $relative_position,
 $anchor_block_type, $context ) {
         if ( 'after' === $relative_position && 'core/separator' ===
 $anchor_block_type ) {
             $hooked_block_types[] = 'core/post-title';
         }
         return $hooked_block_types;
     },
     10,
     4
 );
 }}}

 3. Create a new page and add a Separator block
 4. Visit a page (using theme template) and a post (using plugin template)
 5. Notice the page correctly applies the block hook, while the post
 doesn't

 **Expected Result:** Block hooks should be applied consistently to all
 template sources (theme, user-created, and plugin-registered).

 **Actual Result:** Plugin-registered templates do not have block hooks
 applied, while theme templates and user-created templates do.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/63808>
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