The issue here is that we expect some attributes to be part of the Searchable Attributes, to access their highlighted value for instance.
Were your searchable attributes empty before you’ve added
title? We’ve had a bug where the index settings could not correctly be set which you might have been a victim of.
Without any attribute, everything works fine because by default Algolia considers every attribute as searchable.
You have the list of expected attributes at the bottom of the Products schema section of the documentation:
We need those to be present if you don’t modify the front-end code. You can however reorder them at will and add any other one which you might find relevant!