Plugin Strips Marker HTML

Ah, good catch, however removing that marker doesn’t resolve the issue. I have disabled your plugin so you can see how the marker content is meant to look … ?

I’ve re-enabled the plugin and disabled both cluster and fullscreen shortcodes and the issue persists. So this is odd!

Yeah, we use the Shortcode block to inject our markers dynamically. But surely this would only decode HTML entities not stripe HTML tags?

I can confirm that commenting out the render_block filter resolves the issue!

I can also confirm that we also use do_shortcode() (within our own shortcode) to render the markers dynamically …

$lat = filter_var(get_post_meta($post->ID, 'geo_latitude', true), FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
$lng = filter_var(get_post_meta($post->ID, 'geo_longitude', true), FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
if ($lat && $lng) {
    $content .= do_shortcode('[leaflet-marker svg lat=' . esc_attr($lat) . ' lng=' . esc_attr($lng) . ' iconClass="dashicons-svg dashicons-svg-' . esc_attr(sanitize_key($marker_icon['iconClass'])) . '"]' . $marker_content . '[/leaflet-marker]');
}

I was going to suggest setting the filter callback as a named function rather than an anonymous one so that it could be removed with remove_filter() but if it’s not needed at all and you’re going to remove it, that works too 🙂