Extends inside tab not working

Im trying use two field groups inside a tab. My tab blueprint looks like this:

label: Social Media
icon: globe
fields:

  socialfallback:
    label: Social Fallback Images
    type: headline

  extend: socialfallback

  logos:
    label: Logo Images
    type: headline

  extend: logo

However, the panel is rendering the fields inside the extended logo under the “Social Fallback Images”, and ignoring extend: socialfallback. It seems to take the last declared extend, renders it where the first one was declared, and then ignores all other extends.

I know the field groups work, since they do if I use them individually.

Bug?

Some issues:

  • The property is called extends, not extend
  • Wrong indentation
  • folder missing, unless they are in the same folder

But nothing at all shows up if i fix that. The path isnt needed as these are coming from a plugin and its set to load without the folder name.

label: Social Media
icon: globe
fields:

  socialfallback:
    label: Social Fallback Images
    type: headline
    extends: socialfallback

  logos:
    label: Logo Images
    type: headline
    extends: logo

The tab im also loading it into is in the same plugin too…

'blueprints' => [
  // TABS
  'tabs/publishing'      => __DIR__ . '/blueprints/tabs/publishing.yml',
  'tabs/seo'             => __DIR__ . '/blueprints/tabs/seo.yml',
  'tabs/socialmedia'     => __DIR__ . '/blueprints/tabs/socialmedia.yml',
  'tabs/content'         => __DIR__ . '/blueprints/tabs/content.yml',
  'tabs/sitefiles'       => __DIR__ . '/blueprints/tabs/sitefiles.yml',
  // FIELDS
  'settings'             => __DIR__ . '/blueprints/fields/settings.yml',
  'logo'                 => __DIR__ . '/blueprints/fields/logo.yml',
  'socialfallback'       => __DIR__ . '/blueprints/fields/socialfallback.yml',
],

Ahhh… needs the key above it…

  socialfallback:
    label: Social Fallback Images
    type: headline
  socialfiles:
    extends: socialfallback

  logos:
    label: Logo Images
    type: headline
  logofiles:
    extends: logo