Shortcodes not expanded in term_description

[bobbingwide]

Since updating to WordPress 5.9, URLs such as this one https://fernsofmacaronesia.org.uk/islands/azores/ no longer display the image attached to the taxonomy description and the [caption] shortcode is not expanded.

Why not?

Problem determination

• I can't reproduce in my local copy since it's a long way behind
• Attempt to reproduce in cwiccer using: WordPress 5.9, ThisIs..., Category taxonomy eg s.b/cwiccer/category/blocks/
• Attempt to reproduce in another local installation using: WordPress 5.9, Twenty Sixteen theme and the Category taxonomy

[bobbingwide]

Attempt to reproduce in cwiccer using: WordPress 5.9, ThisIs..., Category taxonomy eg s.b/cwiccer/category/blocks/

I had no problem using oik shortcodes and the term-description block.

[bobbingwide]

oik shortcodes weren't expanded with Twenty Sixteen, but were with ThisIs...
which includes the following code in functions.php.

do_action( "oik_add_shortcodes" );

[bobbingwide]

Explanation

In the live site for FOM, Yoast SEO was not activated.
When Yoast SEO is activated.

1. The Edit Category admin page is enhanced. The Description field is displayed using TinyMCE, supportin an Add Media button and Visual and Text display modes.
2. It adds support for shortcode expansion

The following hooks are attached to the term_description filter.

: 10   wptexturize;1 convert_chars;1 wpautop;1 shortcode_unautop;1 Yoast\WP\SEO\Integrations\Front_End\Category_Term_Description::add_shortcode_support;1

Yoast SEO adds its hook to both category_description and term_description.

[bobbingwide]

Now that Andrew's problem's been resolved I'm going to transfer this issue to oik.
It needs to hook into term_description using the same logic as for the_content

 add_filter( 'term_description', 'oik_do_shortcode', 0 );

does it also need to add

add_filter( 'the_excerpt', 'do_shortcode' );

when Yoast SEO isn't active?

[bobbingwide]

Developed for oik v4.6.0, released in oik v4.7.1