[wp-trac] [WordPress Trac] #47548: `transition_post_status` hook is triggered twice when a post is scheduled in the block editor

[WordPress Trac]

#47548: `transition_post_status` hook is triggered twice when a post is scheduled
in the block editor
-------------------------------+-----------------------------
 Reporter:  sudar              |      Owner:  (none)
     Type:  defect (bug)       |     Status:  new
 Priority:  normal             |  Milestone:  Awaiting Review
Component:  Posts, Post Types  |    Version:  trunk
 Severity:  normal             |   Keywords:
  Focuses:  administration     |
-------------------------------+-----------------------------
 The `transition_post_status` hook is getting triggered twice for scheduled
 posts when using block editor with the same `$old_status` and
 `$new_status` parameters.

 Here are the steps to replicate this.

 {{{#!php
 <?php
         add_action( 'transition_post_status', 'on_post_status_changed',
 10, 3 );

         function on_post_status_changed( $old_status, $new_status, $post )
 {
                 error_log( "$old_status -> $new_status for " . $post->ID
 );
         }
 }}}

 - Add the above code in a new plugin or functions.php file
 - Create a new post in block editor and schedule it
 - The hook will be triggered and you will get entries in the error log
 - Now Make some changes and then click the Schedule button
 - The hook will be triggered twice and you will two entires in the error
 log. Both the entires will have the old and new status and `future`.

 If we don't use the block editor but only the classic editor, then it will
 be triggered only once.

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Ticket URL: <https://core.trac.wordpress.org/ticket/47548>
WordPress Trac <https://core.trac.wordpress.org/>
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