Hi, I have a filter query, but it's returning a null result:

{
  "q": "apple",
  "page": 1,
  "per_page": 50,
  "query_by": "title, additionalCategories, sku",
  "exclude_fields": "embedding",
  "filter_by": "additionalCategories:=Promo Zone"
}

The dataset contains relevant data for the filter, but it's not returning any results. By the way,

additionalCategories

is a

string[]

field. However, I am getting results for the following query:

{
  "q": "apple",
  "page": 1,
  "per_page": 50,
  "query_by": "title, additionalCategories, sku",
  "exclude_fields": "embedding",
  "filter_by": "additionalCategories:=[\"Promo Zone\"]"
}

Any idea what could be causing this?