Problem with Metadescription

When I carried out changes at the title and metadescription boxes, on the google result pages just appear the changes on the title, at the metadescription just appear some information about contact or footer parts.

I have followed all the steps contained in: https://yoast.com/help/my-meta-descriptions-arent-showing-up-in-the-search-result-pages/

I have content at the correct area, not predefined metadescription set up, site:…… appear correctly.

Please, can somebody help me?

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