Yes, I am able to reproduce this with few records. Collection schema:

curl -X POST '<http://localhost:8108/collections>' \
-H 'X-Typesense-Api-Key: xyz' \
-H 'Content-Type: application/json' \
-d '{
  "name": "product_variant",
  "fields": [
    {"name": "id", "type": "string", "index": true},
    {"name": "productId", "type": "string", "facet": true},
    {"name": "productSlug", "type": "string", "index": true},
    {"name": "variantID", "type": "string","sort": true},
    {"name": "enabled", "type": "string", "index": true},
    {"name": "title", "type": "string", "index": true}
  ]
}'

Collection documents:

curl -X POST '<http://localhost:8108/collections/product_variant/documents/import>' \
-H 'X-Typesense-Api-Key: xyz' \
-H 'Content-Type: application/jsonl' \
-d '{"id": "1","productId": "1","productSlug": "slug1", "variantID": "v1", "enabled": "Yes", "title": "Nirlon Cast Iron Dosa Tawa  - 12 Inches"}
{"id": "2","productId": "1","productSlug": "slug1", "variantID": "v2", "enabled": "No", "title": "Tarami Ethnic Bedsheet - Green"}
{"id": "3","productId": "2","productSlug": "slug2", "variantID": "v3", "enabled": "Yes", "title": "Nirlon Orange Non Stick Dosa Tawa  - 11 Inches"}
{"id": "4","productId": "3","productSlug": "slug3", "variantID": "v4", "enabled": "Yes", "title": "Nirlon Orange Non Stick Dosa Tawa  - 10 Inches"}'

Search call with pinned hits that gives only one result:

curl --location '<http://localhost:8108/collections/product_variant/documents/search?pinned_hits=2%3A1&q=dasa&query_by=title&filter_curated_hits=true&typo_tokens_threshold=10>' \
--header 'x-typesense-api-key: xyz'

Search call without pinned hits that gives the actual results:

curl --location '<http://localhost:8108/collections/product_variant/documents/search?q=dasa&query_by=title&filter_curated_hits=true&typo_tokens_threshold=10>' \
--header 'x-typesense-api-key: xyz'

If you can confirm that I am not doing anything wrong here, I can raise an issue on github.