Metatag overwrite for title meta tag is not working

Dangit :-\

We are also seeing this behavior; trying to update meta tags for specific content types and product entities and it seems to be overwritten by global meta tags.

Probably this issue is already solved, but just in case I was able to make it work adding :value to the metatag field.

Example: [node:field_share_description:value] instead of [node:field_share_description]

If you ask my why this works, I have no idea, I'm sorry.

I had this occur in a website configured in 2016. It turned out the default values were not correctly overridden because the global setting was set as a default value in the field instance setting (field.field.node.page.field_metatags.yml):

Before:

uuid: 855469c0-c7b8-4b55-bd41-0bfeb0ee08be
langcode: en
status: true
dependencies:
  config:
    - field.storage.node.field_metatags
    - node.type.page
  module:
    - metatag
id: node.page.field_metatags
field_name: field_metatags
entity_type: node
bundle: page
label: Metatags
description: ''
required: false
translatable: true
default_value:
  -
    value: 'a:1:{s:5:"title";s:34:"[current-page:title] | [site:name]";}'
default_value_callback: ''
settings: {  }
field_type: metatag

Fixed:

uuid: 855469c0-c7b8-4b55-bd41-0bfeb0ee08be
langcode: en
status: true
dependencies:
  config:
    - field.storage.node.field_metatags
    - node.type.page
  module:
    - metatag
id: node.page.field_metatags
field_name: field_metatags
entity_type: node
bundle: page
label: Metatags
description: ''
required: false
translatable: true
default_value: {  }
default_value_callback: ''
settings: {  }
field_type: metatag

having this issue also in d7

The problem appears to be after a newly created node is saved.

Here's my scenario:
The metatag values for my news content type has a different og:image and twitter_cards_image value from what is defined for the global metatag configuration.

When I create a news item, the metatag values that show up in the sidebar are correct--they're from the news content type's metatag settings.

But when I save the node, the page html shows the global settings. And when I edit the newly created node, the metatag settings have been changed to the global values.

So my guess is that on save, the metatag module is ignoring the news values that are in the metatag form on the news page, and defaulting to the global values.

@idebr's fix worked for me; I had two content types that had that default value and the metatag was overwritten for them; new content types that I recently created did not have the default value set, so I got rid of the default for the first 2, and that fixed the issue.

Note that this will only apply to new nodes upon creation; existing nodes with the wrong metatag value will need to be updated manually.

Wow, after 6/7years no progress here, because it's still the same issue on Drupal 11.

Workaround:
1. Add custom textfield to content types: "field_page_title"
2. Fill in some custom page titles to the nodes
3. Add a hook_preprocess and set the page title if field is not empty

/**
 * Implements hook_preprocess_html().
 */
function page_title_override_preprocess_html(array &$variables): void {
  $node = \Drupal::routeMatch()->getParameter('node');
  if (!$node instanceof NodeInterface) {
    return;
  }

  if (!$node->hasField('field_page_title') || $node->get('field_page_title')->isEmpty()) {
    return;
  }

  $title = trim((string) $node->get('field_page_title')->value);
  if ($title === '') {
    return;
  }

  // html.html.twig usually renders: {{ head_title|safe_join(' | ') }}
  // Use a single element to set <title> exactly to the field value.
  $variables['head_title'] = [$title];
}