[wp-trac] [WordPress Trac] #55863: Menus broken after upgrade to 6.0

[WordPress Trac]

#55863: Menus broken after upgrade to 6.0
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 Reporter:  darrenburn    |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Menus         |    Version:  6.0
 Severity:  major         |   Keywords:
  Focuses:                |
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 After upgrading WordPress to 6.0, some of the menus on our site broke.

 It didn't happen to all, but to some. We had to restore to the previous
 version of WordPress.

 When going into Appearance - Menus and looking for the menu, the menu
 appears blank in WordPress. However, when I added something back to the
 menu and pressed save all the original menu items reappeared, so there may
 be some kind of database linking error?

 We are nervous to upgrade back to 6.0 as a result.

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Ticket URL: <https://core.trac.wordpress.org/ticket/55863>
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