1. PHP 8.2.13, Phorge at acedbd022d45e34bbb6abbe303f0b97dd6f36e4d
2. Go to http://phorge.localhost/phame/blog/edit/
3. Create a new blog at http://phorge.localhost/phame/blog/manage/1/
4. Go to http://phorge.localhost/phame/post/edit/?blog=1 , enter First post as Title, and click Create New Post
5. Go to http://phorge.localhost/phame/blog/feed/1/ and look at the source which lacks a <published> tag. However it includes an <updated> tag: <id>http://phorge.localhost/phame/post/view/1/</id><author><name>admin (admin)</name></author><updated>2023-12-05T14:44:46+00:00</updated>

Upstreaming from https://phabricator.wikimedia.org/T188890