Can't save and delete when using custom template for post with multibyte in site editor

[s56bouya]

Description

When a post containing multibyte characters is selected as a template, it cannot save and delete.

At a later date, I changed the slug thinking multibyte characters were affecting it, but now the template is not found and can't be edited. Still can't delete.

Step-by-step reproduction instructions

1. Dashboard->Appearance->Editor
2. Editor->Templates->Add New->Single item: Post->Post For a specific item
3. Select posts with multi-byte characters (e.g. https://abc.com/アイスクリーム)

Screenshots, screen recording, code snippet

Environment info

• WP 6.1
• Twenty Twenty-Three

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[Mamaduka]

Related #45633.

The templates REST API only supports Latin characters for template slugs.

[github-actions]

Hi,
This issue has gone 180 days without any activity. This means it is time for a check-in to make sure it is still relevant. If you are still experiencing this issue with the latest versions, you can help the project by responding to confirm the problem and by providing any updated reproduction steps.
Thanks for helping out.

[github-actions]

Hi,
This issue has gone 30 days without any activity. This means it is time for a check-in to make sure it is still relevant. If you are still experiencing this issue with the latest versions, you can help the project by responding to confirm the problem and by providing any updated reproduction steps.
Thanks for helping out.

[jordesign]

Closing this issue - as the underlying cause was fixed in WordPress 6.2
https://core.trac.wordpress.org/ticket/57329