App Search - How to add "multi field", a field with array of values (like color)

Hi everyone,
I am trying to use App Search, and when I index a document that looks like:

name: 'metalica t-shirt'
colors: ['red', 'black']

The engine removes 'black' and leaves it as:

name: 'metalica t-shirt'
colors: 'red'

But I want it to appear both under 'red' color and 'black' color filter on Search UI, is it supported?

Hey Eli!

First, let's make sure the document is indexed correctly. Could you check in App Search documents page /app/enterprise_search/app_search/engines/[ENGINE_NAME]/documents, if the colors value shows both colors or just one?