id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc,focuses 55117,Possible 5.9 Bug: Unknown character ( or %ef%bf%bc ) on content title,cantuaria,audrasjb,"Since WordPress 5.9, one of my clients revistabula.com started having an akward bug. Sometimes, the character  (%ef%bf%bc) is being automatically inserted in the post title after a publish or update using the visual editor. He uses an environment different from mine, so I couldn't reproduce the issue myself, he uses Chrome and Mac. As such, I don't know if this is a bug from 5.9 itself or from a plugin. In any case, I've fixed the issue with a simple string replace at `wp_insert_post_data` action. But yesterday, one of the blogs I follow, published an article containing the same bug: https://macmagazine.com.br/post/2022/02/07/promocoes-na-app-store-swim-out-911-operator-navidys-dislexia-spelling-help-e-mais%ef%bf%bc/ . It's a Mac centered blog, so I suppose they also use Mac for editing (Ps.: not sure if they will fix it) I've then searched on Google for this issue, and it have a few complains from a couple of years ago, related with Yoast SEO plugin. But none recent. I've then searched for that symbol in *.wordpress.* domains [https://www.google.com/search?q=%25ef%25bf%25bc%2F+site%3A*.wordpress.*&biw=1325&bih=1311&tbs=cdr%3A1%2Ccd_min%3A1%2F1%2F2021%2Ccd_max%3A1%2F1%2F2021&ei=u70CYoqZBMy45OUP6t-6cA&ved=0ahUKEwjK4r6c5fD1AhVMHLkGHeqvDg4Q4dUDCA4&uact=5&oq=%25ef%25bf%25bc%2F+site%3A*.wordpress.*&gs_lcp=Cgdnd3Mtd2l6EANKBAhBGAFKBAhGGABQAFgAYLoEaAFwAHgAgAEAiAEAkgEAmAEAwAEB&sclient=gws-wiz in Google at whole 2021] and [https://www.google.com/search?q=%25ef%25bf%25bc/+site:*.wordpress.*&tbs=qdr:w&source=lnt&sa=X&ved=2ahUKEwi6g-We5fD1AhXeFbkGHVFQBzYQpwV6BAgCEBw&biw=1325&bih=1311&dpr=1 for the last weeks]... no results in 2021, 3 pages of results for last week. Anyone else having this issue or can better test on a Mac trying to reproduce the issue? Also, not sure if this should be filled at Gutenberg, as I'm not sure if the issue happens in old editor as well.",defect (bug),closed,normal,6.1,Permalinks,5.9,normal,fixed,has-testing-info has-screenshots has-patch needs-testing,,