One of WordPress’ block editor’s “nastiest” quirks is [how it deals with “classic” meta boxes](https://jan.boddez.net/articles/wordpress-block-editor-and-custom-post-meta), [including the Custom Fields panel](https://jan.boddez.net/articles/the-block-editor-custom-meta-and-activitypub).
It’s why in my ActivityPub add-on plugin, I had to [“delay” federation to a later hook](https://github.com/janboddez/addon-for-activit…