Magento 2 Some links from staging home page redirect to the production site

Some links from staging home page redirect to the production site.
Analyzing...
It is home page, so, I have to check cms* tables.
I checked with

select title,content from cms_block where content like '%www.prod.com%';

and found three records
I modified them with  variable {{config path="web/secure/base_url"}} instead of prod domain.
It could be done via Admin Panel or via

Cleared FPC cache
UPDATE cms_block set content = REPLACE(content, 'https://www.prod.com/', '{{config path="web/secure/base_url"}}') WHERE content LIKE '%https://www.prod.com/%';