[wp-trac] [WordPress Trac] #45987: Hierarchical Custom Post Types Missing Parent Drop Down

[WordPress Trac]

#45987: Hierarchical Custom Post Types Missing Parent Drop Down
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 Reporter:  sparkjoystudios    |      Owner:  (none)
     Type:  defect (bug)       |     Status:  new
 Priority:  normal             |  Milestone:  Awaiting Review
Component:  Posts, Post Types  |    Version:  5.0.3
 Severity:  normal             |   Keywords:
  Focuses:                     |
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 After updating to 5.0 (currently running 5.0.3) all hierarchical custom
 post types are missing the Parent Drop Down in the Page Attributes meta
 box.

 All post types are registered with 'hierarchical' => true, and
 'show_in_rest' => true

 Pages still has the drop down in the new editor. Changing 'show_in_rest'
 to false and using the old editor still allows the user to assign
 parent/child relationships.

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Ticket URL: <https://core.trac.wordpress.org/ticket/45987>
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