[wp-trac] [WordPress Trac] #55803: Span is removed from title due page saving

[WordPress Trac]

#55803: Span is removed from title due page saving
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 Reporter:  joyster                              |       Owner:  (none)
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  Future
                                                 |  Release
Component:  Editor                               |     Version:  5.9.3
 Severity:  normal                               |  Resolution:
 Keywords:  has-testing-info needs-patch has-    |     Focuses:
  screenshots                                    |
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Changes (by ironprogrammer):

 * keywords:  has-testing-info needs-patch => has-testing-info needs-patch
     has-screenshots


Comment:

 == Reproduction Report
 I am able to reproduce this issue using the Editor, but not with the
 [https://wordpress.org/plugins/classic-editor/ Classic Editor plugin]
 activated as originally noted in comment:2. Note that testing in comment:7
 did not have any plugins active, whose results are consistent with my
 testing.

 === Environment
 - Hardware: MacBook Pro Apple M1 Pro
 - OS: macOS 12.6.3
 - Browser: Safari 16.3
 - Server: nginx/1.23.3
 - PHP: 7.4.33
 - WordPress: 5.9.3 and 6.1.1
 - Theme: twentytwentytwo v1.1
 - Active Plugins:
  - classic-editor v1.6.2; both inactive 🔴 and active 🟢

 === Actual Results
 - ✅ With built-in WordPress Editor, modifying a saved post title wrapped
 in `<span>` tags causes the tags to be removed when saved again.
 - ❌ With the Classic Editor plugin active, `<span>` tags around the post
 title are retained and editable.

 === Supplemental Artifacts
 ✅ Reproduced with native Editor.
 - WordPress 5.9.3: https://cloudup.com/i4mLb_fyo03 (video)
 - WordPress 6.1.1: https://cloudup.com/iHqr5DOGcWI (video)

 ❌ Unable to reproduce with Classic Editor active.
 - WordPress 5.9.3: https://cloudup.com/iicsxNugOB4 (video)

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Ticket URL: <https://core.trac.wordpress.org/ticket/55803#comment:14>
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