I get random results when I type an insignificant sentence

Hello, it has nothing to do with the behavior of the view. These are the search results that are not good, because if I type "education", the search engine returns all the results that contain that word and it is perfect. However, if I type a random string like "aaabbb", the search engine will still return results (which do not contain that word) when it should not.

I have an index with all my content indexed, associated with a solr server. Then I have my search form block in my search page (view display). So I'm sure that my results are from solr.

I enabled search_api_solr_devel but I don't know how to see what is wrong.

I looked for the option to display all entities if there's no results (in my view), but it is not my problem. Because when I type something like "zzzzz", not all results come out, but only a few.

For example, I have 266 items in my index and if I search for the string "zzzz", I have 60 results found, but none of them contain the string "zzzz", so why are they displaying?

I created another core and another index for testing, and the problem seems to come from my "Rendered HTML output" field.

I need to index this field because it is in the list of skipped fields.

See :

The following fields cannot be indexed since there is no type mapping for them:

Content Builder (type "field_item:gavias_content_builder")

How can I index this field without "Rendered HTML Output"?

I fixed it with the "direct query" parse mode in my view.

I'm not sure, but since I set this mode, my search works good.