Tried it today, immediately 11 problems :-/

Hello,

Please find below answers to your questions

1. Have seen that filter in code, would like to know why/where first line/html-tag of content comes from if meta description default setting is empty.

– The first line of a text is used as fallback content when the excerpt, descriptions fields are empty. We are doing it this way to prevent the description tag from showing nothing. If you want to remove the meta description tag, then please use below filter code:

add_filter( 'rank_math/frontend/description', function( $description ) {
	if ( is_single() ) {
            return '';
	}

	return $description;
});

3. No excerpt is saved at post, still %excerpt_only% shows auto generated text in og:description.

– Are you using %excerpt_only% in the Facebook Description field or you’ve kept it blank?

4. Question is for og:description, not meta description. Maybe you can consider filters for both description length variables?

– Please use below filter code to change the og:description:

add_filter( "rank_math/opengraph/facebook/og_description", function( $content ) {
   return $content; // Change content here.
});

8. & 9. No caching was used, fields were missing in output.

– To check this issue, we’ll need your site’s login access. Can you create a staging site and add the access details in the Sensitive Data Section?

Looking forward to helping you. Thank you.

Hello,

1. I do not want to remove the meta description tag in general. I want the html tag not existant if no meta description has been manually entered at single post. How can I switch off that “first line of a text” fallback?

– We are intentionally using the content as a fallback description, so the description tags won’t be empty. To prevent the fallback function from loading, please add below code in your theme’s functions.php file:

add_filter( 'rank_math/frontend/description', function( $description ) {

	if ( is_singular() ) {
		global $post;
		$description = get_post_meta( $post->ID, 'rank_math_description', true );
	}

	return $description;
});

3. I used %excerpt_only% at og:description and still get data in output.
Single Post Description: %excerpt_only%
Description: %excerpt_only%

– The og:description again shows the fallback description, if nothing is added in the Excerpt field. You can use below filter code to show the excerpt text in og & twitter description tags:

add_filter( 'rank_math/opengraph/facebook/og_description', 'rank_math_social_description' );
add_filter( 'rank_math/opengraph/twitter/twitter_description', 'rank_math_social_description' );
function rank_math_social_description( $content ) {
	if ( is_singular() ) {
		global $post;
		$content = $post->post_excerpt;
	}

	return $content;
}

8. & 9. I have set up a sandbox and will provide the login.

– I see the Optician schema is missing some fields which are throwing a warning. I’ve forwarded this issue to our Development team, they will further debug this issue and release an update. For now, to fix the issue on your site, I added below filter code in your theme’s functions.php file:

add_filter( 'rank_math/json_ld', function( $data, $json_ld ){
	if ( isset( $data['Organization'] ) ) {
		$data['Organization']['image']      = $data['Organization']['logo'];
		$data['Organization']['telephone']  = $data['Organization']['contactPoint'][0]['telephone'];
		$data['Organization']['priceRange'] = RankMath\Helper::get_settings( 'titles.price_range' );
		unset( $data['Organization']['contactPoint'] );
		unset( $data['Organization']['logo'] );
	}

	return $data;
}, 20, 2 );

This seemed to have fixed the issue. Can you please confirm?

Hope that helps. If there is anything else, please let us know.

Thank you.