[wp-trac] [WordPress Trac] #52440: "Leave site? Changes you made may not be saved" on custom taxonomy pages after WP 5.6.1 update

[WordPress Trac]

#52440: "Leave site? Changes you made may not be saved" on custom taxonomy pages
after WP 5.6.1 update
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 Reporter:  archon810                    |       Owner:  (none)
     Type:  defect (bug)                 |      Status:  new
 Priority:  high                         |   Milestone:  5.6.2
Component:  Editor                       |     Version:  5.6.1
 Severity:  normal                       |  Resolution:
 Keywords:  needs-patch has-screenshots  |     Focuses:
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Comment (by archon810):

 I tried https://core.trac.wordpress.org/attachment/ticket/52440/52440.diff
 on the same site I've originally reported the issue with (with custom
 taxonomies), and it didn't fix the issue. I made sure to clear the
 Cloudflare cache and overwrite the .min file, and that the patched version
 is loading live correctly, yet the prompt still appears.

 [[Image(https://i.imgur.com/Ua4B6Kp.png)]]

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Ticket URL: <https://core.trac.wordpress.org/ticket/52440#comment:17>
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