Highlight issue when negative operator is used

[SanthoshVeerabathiran]

Description

I encountered an issue with negative queries in Typesense. Even when using a negative query term with a '-' prefix to exclude certain results, the exclusion does not seem to be functioning correctly. This issue is affecting the accuracy of search results in our application.

Steps to reproduce

Search Parameters:

{
  q: '8 -erteiouteriuiiruw',
  query_by: [ 'id_1', 'id_2' ],
  filter_by: 'id_4:=23456',
  limit: 2
}

Response:

{
  facet_counts: [],
  found: 51,
  hits: [
    {
      document: {
        id: '50',
        id_1: '82237e7b23c8d00c10',
        id_2: '822352dd4972780d06',
        id_3: '82237e7b98c8d01919',
        id_4: '23456',
        id_5: '8345937493845',
        id_6: '947693749839',
        id_7: '9834758374587',
        id_8: '822399482342',
        id_9: '893745876231'
      },
      highlight: {
        id_1: {
          matched_tokens: [ '82237e7b23c8d00c1' ],
          snippet: '<mark>82237e7b23c8d00c1</mark>0'
        },
        id_2: {
          matched_tokens: [ '822352dd4972780d0' ],
          snippet: '<mark>822352dd4972780d0</mark>6'
        }
      },
      highlights: [
        {
          field: 'id_1',
          matched_tokens: [ '82237e7b23c8d00c1' ],
          snippet: '<mark>82237e7b23c8d00c1</mark>0'
        },
        {
          field: 'id_2',
          matched_tokens: [ '822352dd4972780d0' ],
          snippet: '<mark>822352dd4972780d0</mark>6'
        }
      ],
      text_match: 578730089005449300,
      text_match_info: {
        best_field_score: '1108074561536',
        best_field_weight: 15,
        fields_matched: 1,
        num_tokens_dropped: 0,
        score: '578730089005449337',
        tokens_matched: 1,
        typo_prefix_score: 1
      }
    },
    {
      document: {
        id: '49',
        id_1: '82237e7b23c8d00c10',
        id_2: '822352dd4972780d06',
        id_3: '82237e7b98c8d01919',
        id_4: '23456',
        id_5: '8345937493845',
        id_6: '947693749839',
        id_7: '9834758374587',
        id_8: '822399482342',
        id_9: '893745876231'
      },
      highlight: {
        id_1: {
          matched_tokens: [ '82237e7b23c8d00c1' ],
          snippet: '<mark>82237e7b23c8d00c1</mark>0'
        },
        id_2: {
          matched_tokens: [ '822352dd4972780d0' ],
          snippet: '<mark>822352dd4972780d0</mark>6'
        }
      },
      highlights: [
        {
          field: 'id_1',
          matched_tokens: [ '82237e7b23c8d00c1' ],
          snippet: '<mark>82237e7b23c8d00c1</mark>0'
        },
        {
          field: 'id_2',
          matched_tokens: [ '822352dd4972780d0' ],
          snippet: '<mark>822352dd4972780d0</mark>6'
        }
      ],
      text_match: 578730089005449300,
      text_match_info: {
        best_field_score: '1108074561536',
        best_field_weight: 15,
        fields_matched: 1,
        num_tokens_dropped: 0,
        score: '578730089005449337',
        tokens_matched: 1,
        typo_prefix_score: 1
      }
    }
  ],
  out_of: 51,
  page: 1,
  request_params: {
    collection_name: 'sample',
    first_q: '8 -erteiouteriuiiruw',
    per_page: 2,
    q: '8 -erteiouteriuiiruw'
  },
  search_cutoff: false,
  search_time_ms: 0
}

1. Send a search request to Typesense with a negative query term.
2. Include a negative query term with a '-' prefix, such as '8 -erteiouteriuiiruw', in the search parameters.
3. Execute the search request and observe the results.

Expected Behavior

The search results should exclude any documents containing the negative query term ('erteiouteriuiiruw').

Actual Behavior

There are matches to words that were not specified in the query, leading to incorrect results.

Metadata

Typesense Version: 26.0

[kishorenc]

Instead of <mark>82237e7b23c8d00c1</mark>0 it should be highlighted as <mark>8</mark>2237e7b23c8d00c10.