React InstantSearch (with Typesense): facets not working with multiple collections

Question

I am using React InstantSearch with the Typesense adapater.

Our search data has two collections - emails and attachments.

• Both collections have a facet for sender's email (from_email)
• Attachments also have a facet for file extension (ext)

If I configure my search for one of the collections only everything works as expected but for some reason I cannot get file type refinement list to work if I have both collections in use.

If I have both collections in use no matter what I select from file type refinement list it does not affect search results. I am clearly not using the search correctly but cannot figure out what I'm doing wrong.

Simplified version of my code:

import {
  useMemo,
  useState,
} from 'react';
import {
  Configure,
  Index,
  InstantSearch,
} from 'react-instantsearch';
import TypesenseInstantSearchAdapter from 'typesense-instantsearch-adapter';

function EmailSearch() {

  const searchClient = useMemo(() => {
    if (userConfig) {
      const typesenseInstantsearchAdapter = new TypesenseInstantSearchAdapter({
        server: {
          apiKey: userConfig.search.apiKey,
          nodes: [...],
        },
        collectionSpecificSearchParameters: {
          collection_emails: {
            query_by: 'subject,from_name,from_email,body',
          },
          collection_attachments: {
            query_by: 'filename,content,ext',
          },
        },
      });

      return typesenseInstantsearchAdapter.searchClient;
    }
    return null;
  }, [userConfig]);

  return (
    <InstantSearch
      searchClient={searchClient}
      indexName="collection_emails"
      future={{
        preserveSharedStateOnUnmount: true,
      }}
    >
      <Configure hitsPerPage={5} />

      <CustomSearchBox /> { /* Custom search box component */ }
      <FromRefinementList attribute="from_email" /> { /* both collections have "from_email" */ }
      <Index indexName="collection_attachments">
        <FileTypeRefinementList attribute="ext" /> { /* only attachments have "ext" */ }
      </Index>

      <Index indexName="collection_emails">
        <EmailHits />
      </Index>
      <Index indexName="collection_attachments">
        <AttachmentHits />
      </Index>

    </InstantSearch>
  );
}

When I select one email address from FromRefinementList and one file type from FileTypeRefinementList this is what is sent to the search engine:

"searches": [
  {
    "query_by": "subject,from_name,from_email,body",
    "collection": "collection_emails",
    "q": "*",
    "facet_by": "from_email",
    "filter_by": "from_email:=[`[email protected]`]",
    "max_facet_values": 10,
    "page": 1,
    "per_page": 5
  },
  {
    "query_by": "subject,from_name,from_email,body",
    "collection": "collection_emails",
    "q": "*",
    "facet_by": "from_email",
    "max_facet_values": 10,
    "page": 1
  },
  {
    "query_by": "filename,content,ext",
    "collection": "collection_attachments",
    "q": "*",
    "facet_by": "ext,from_email",
    "filter_by": "ext:=[`pdf`] && from_email:=[`[email protected]`]",
    "max_facet_values": 10,
    "page": 1,
    "per_page": 5
  },
  {
    "query_by": "filename,content,ext",
    "collection": "collection_attachments",
    "q": "*",
    "facet_by": "ext",
    "filter_by": "from_email:=[`[email protected]`]",
    "max_facet_values": 10,
    "page": 1
  },
  {
    "query_by": "filename,content,ext",
    "collection": "collection_attachments",
    "q": "*",
    "facet_by": "from_email",
    "filter_by": "ext:=[`pdf`]",
    "max_facet_values": 10,
    "page": 1
  },
  {
    "query_by": "subject,from_name,from_email,body",
    "collection": "collection_emails",
    "q": "*",
    "facet_by": "from_email",
    "filter_by": "from_email:=[`[email protected]`]",
    "max_facet_values": 10,
    "page": 1,
    "per_page": 5
  },
  {
    "query_by": "subject,from_name,from_email,body",
    "collection": "collection_emails",
    "q": "*",
    "facet_by": "from_email",
    "max_facet_values": 10,
    "page": 1
  },
  {
    "query_by": "filename,content,ext",
    "collection": "collection_attachments",
    "q": "*",
    "facet_by": "from_email",
    "filter_by": "from_email:=[`[email protected]`]",
    "max_facet_values": 10,
    "page": 1,
    "per_page": 5
  },
  {
    "query_by": "filename,content,ext",
    "collection": "collection_attachments",
    "q": "*",
    "facet_by": "from_email",
    "max_facet_values": 10,
    "page": 1
  }
]