The instruction under the field on an Edit Node page say "Multiple values may be used, separated by a comma"
This is not working, multiple values return multiple tags as below:
<meta property="og:image" content="https://www.aroundosceola.com" />
<meta property="og:image" content="https://www.aroundosceola.com/sites/aroundosceola.etypegoogle7.com/files/styles/article_420/public/2020-01/osceola-facebook.png" />
<meta property="og:image:url" content="https://www.aroundosceola.com" />
<meta property="og:image:url" content="https://www.aroundosceola.com/sites/aroundosceola.etypegoogle7.com/files/styles/article_420/public/2020-01/osceola-facebook.png" />
<meta property="og:image:secure_url" content="https://www.aroundosceola.com" />
<meta property="og:image:secure_url" content="https://www.aroundosceola.com/sites/aroundosceola.etypegoogle7.com/files/styles/article_420/public/2020-01/osceola-facebook.png" />
In addition, as you can see using [node:field_image] as a token (a valid field) results in the tag content being "https://www.aroundosceola.com" and not the full image path.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I experienced this issue also. The token used was [node:field_content_image:entity], which I assume worked at some point.
After reading https://www.drupal.org/docs/contributed-modules/metatag/frequently-asked... → , I realized the proper token is [node:field_content_image:entity:field_media_image:entity:url].