[wp-trac] [WordPress Trac] #51867: Page Parent dropdown is a huge mess

[WordPress Trac]

#51867: Page Parent dropdown is a huge mess
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 Reporter:  jamesdonegan       |      Owner:  (none)
     Type:  defect (bug)       |     Status:  new
 Priority:  normal             |  Milestone:  Awaiting Review
Component:  Posts, Post Types  |    Version:  5.6
 Severity:  major              |   Keywords:
  Focuses:                     |
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 I have seen a few posts (including in this forum) related to this topic,
 but none seems to exactly address what is going on. Even when I disable
 all plugins and change to a default theme, the Page Parent dropdown is a
 huge mess — this is true of two different websites I manage, each of which
 has hundreds of Pages (plus posts and other custom post types).

 The problem is that (a) the Page Parent dropdown lists many pages multiple
 times (literally some pages will appear three or four times in the
 dropdown, and it seems to repeat a loop) and (b) not all pages are there.
 So even though it's showing a few multiple times, some don't appear even
 once.

 The work-around seems to be to create a new page, then return to "All
 Pages" and make the parent relationship in Quick Edit. It works, but it is
 a tremendous inconvenience.

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Ticket URL: <https://core.trac.wordpress.org/ticket/51867>
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