[wp-trac] [WordPress Trac] #55117: Possible 5.9 Bug: Unknown character ( or %ef%bf%bc ) on content title

[WordPress Trac]

#55117: Possible 5.9 Bug: Unknown character ( or %ef%bf%bc ) on content title
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 Reporter:  cantuaria     |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Editor        |     Version:  5.9
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by archon810):

 Not sure if this is related, but the timing is very suspect. We have a
 custom taxonomy, and randomly, it seems some slugs got changed to add
 these weird characters all of a sudden. For example, `clubhouse-drop-in-
 audio-cha%e2%80%aat`. This broke the urls that use those slugs too for
 some reason, and they return as 404. Another variant:
 `accu%e2%80%8bbattery`.

 So where are these `%e2%80%aa` and `%e2%80%8b` characters coming from all
 of a sudden - for published taxonomies no less, not new posts.

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Ticket URL: <https://core.trac.wordpress.org/ticket/55117#comment:8>
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