If I simply put the shortcode at results template, I get same breadcrumbs at each results (home -> search)
<h3>[wpv-post-link]</h3>
[yoast-breadcrumbs]
[wpv-post-excerpt]
How can I reset them to get breadcrumbs per post?
As far as I know, the yoast-breadcrumbs shortcode isn't designed to be used in a listing of posts, it's designed to display information about the post or archive being displayed (i.e. breadcrumbs relative to the current URL). However, I'm not a Yoast expert so I'm not the best source of information about that. If you need to display breadcrumb information about each post in a View's loop, I suggest reaching out to the Yoast support team to see if their yoast-breadcrumbs shortcode allows you to add a specific post ID as a shortcode attribute. If so, you could pass in the current post's ID using the wpv-post-id shortcode from Views, something like this:
[yoast-breadcrumbs post-id="[wpv-post-id]"]
Again, that would only work if the yoast-breadcrumb shortcode accepts some shortcode argument for a specific post ID. I'm not sure about that, I can't find any documentation about the shortcode's accepted attributes in a quick search.
If the shortcode does not provide the ability to supply an explicit post ID attribute, or they do not have a separate shortcode for some specific post ID's breadcrumbs, it will most likely require custom code. I found some information about their Surfaces API, which can be used to query the breadcrumbs of a specific post: https://developer.yoast.com/customization/apis/surfaces-api
This Stack Overflow article describe other custom solutions for including breadcrumbs in search results:
https://stackoverflow.com/questions/26302801/wordpress-breadcrumbs-in-search-results
In either case, I recommend reaching out to Yoast support for more information as this code is outside the realm of Toolset.
