[wp-trac] [WordPress Trac] #52447: Classic editor Bug after 5.6.1 update

[WordPress Trac]

#52447: Classic editor Bug after 5.6.1 update
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 Reporter:  roger995      |       Owner:  (none)
     Type:  defect (bug)  |      Status:  closed
 Priority:  normal        |   Milestone:
Component:  Editor        |     Version:  5.6.1
 Severity:  normal        |  Resolution:  duplicate
 Keywords:                |     Focuses:  ui
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Description changed by SergeyBiryukov:

Old description:

> "Do You Want to Leave This Site? Changes you made may not be saved" Alert
> notice on leaving updated pages (but not posts) after 5.6.1 update when
> using classic editor.
>
> All plugins and PHP version up to date. No change when deactivating all
> plugins and changing theme. Site health status says "good." Goes away
> when Gutenberg is turned back on. Have read forum posts, but not seeing
> answer.
>
> Code used for disabling Gutenberg:
> add_filter('use_block_editor_for_post', '__return_false', 10);
>
> Thanks

New description:

 "Do You Want to Leave This Site? Changes you made may not be saved" Alert
 notice on leaving updated pages (but not posts) after 5.6.1 update when
 using classic editor.

 All plugins and PHP version up to date. No change when deactivating all
 plugins and changing theme. Site health status says "good." Goes away when
 Gutenberg is turned back on. Have read forum posts, but not seeing answer.

 Code used for disabling Gutenberg:
 {{{
 add_filter('use_block_editor_for_post', '__return_false', 10);
 }}}
 Thanks

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Ticket URL: <https://core.trac.wordpress.org/ticket/52447#comment:2>
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