Some new-thread notifications missing plugin prefix

[dd32]

It's been reported to me that some forum new thread subscription notifications have been being sent with the prefix [WordPress.org Forums] Thread Title rather than [Plugin Name] Thread Title.

This doesn't seem to affect every new-thread notification, but appears to happen enough every day to be noticed and not a once off.

The emails contain the proper term (plugin) unsubscription links, which confirms that thread was correctly created in the right forum, and the email code has the correct context.

This could be related to #3674.

[dd32]

This does look to be related to threads caught in spam / moderation queue.

One example has the email date as Date: Mon, 20 Feb 2023 22:13:21 +0000 but the post_date_gmt field is 2023-02-20 20:56:52 suggesting it was in the moderation queue for just over an hour.

[dd32]

In 12410:

Support Forums: Setup the Directory_Compat classes in the context of the topic when processing email subscriptions for pending/delayed topics.

See #6786.

[dd32]

[12411] missed the ticket.

Support Forums: Return true from Directory_Compat::for_slug() to ensure that individual plugin/theme forums do not return a 404 HTTP code.

See [12410], #6786.

[dd32]

This seems fixed with the above commits.