Wrong "Score" weight

Hi!
We are using Apache Solr for some years and it seems that everything works properly.
But we are confused about how "Score" works.
Here is our live example:
https://www.food4rhino.com/en/browse?searchText=Landscape&sort_by=score&...

When searching "Landscape" this document appears in 3rd page: https://www.food4rhino.com/en/browse?searchText=Landscape&sort_by=score&...

https://www.food4rhino.com/en/app/land-kit

The word "landscape" appears two times in the body.

But this one: https://www.food4rhino.com/en/services/rhino-and-grasshopper-developer-s...
appears in first page, when the word "landscape" appears only in one of the comments.

The weight of the fields in Field biases are:

Node body: 1.0
Title: 5.0
The rendered comments associated with a node: 0.5

Any idea why this:
https://www.food4rhino.com/en/browse?searchText=Landscape&sort_by=score&...
does not appear up in the results?

Regards,
Jordi
JOINSO