HTML tags in post titles are gone when editing existing posts

[rotti]

Hello,

since the update to wordpress 5.9 we've detected some strange behavior, when editing existing posts, that contains HTML-Tags in their post title.
The problem is, when editing the post, the HTML-Tags in the post title, are not displayed in the editor. The tags are just gone.

Steps to reproduce:

1. Create a new post with HTML-Tags in the title for example: "<em>This is my title</em>"
2. Save and publish the post with this title
3. Go back to the "All posts" list
4. Post is correctly displayed with "<em>This is my title</em>" in the list (also the "Quick Edit"-Functionality correctly displays the <em>-Tags)
5. Edit the post
6. The post title lost the <em>-Tags
7. Change the post title to "This is my title 2"
8. Save the post
9. <em>-Tags are totally gone, even in the "All posts" list.

The behavior came through wordpress 5.9, i’ve quickly tested the issue with a complete new and empty 5.8.3 version and a complete new and empty 5.9 version. In the 5.8.3 this behavior is not reproducable, in the 5.9 it is. I’ve used the official docker images for that wordpress:5.8.3 and wordpress:latest, completely new setup without any plugins or custom themes.

I've already created a topic in the forums, where i got the info to create a bug ticket here:
​https://wordpress.org/support/topic/html-tags-in-post-titles-are-gone-when-editing-existing-posts/

If it is necessary i can also provide some screenshots, but i think the problem should be clear.

Best regards
Christoph

[azouamauriac]

Hi there welcome to the trac! thank you for the report. I'm able to reproduce issue and I think this is related Gutenberg so would you like to report the issue here ​https://github.com/WordPress/gutenberg/issues/new/choose ?

Thank you.

[rotti]

Hi @azouamauriac,
thanks for this information. I've created a github issue at ​https://github.com/WordPress/gutenberg/issues/38668 in the Gutenberg project.

[skorasaurus]

closing since this has been reported upstream on the gutenberg issue tracker.

[costdev]

Related: #55803

[ironprogrammer]

#59037 was marked as a duplicate.