Why doesn't the In-App Hub (formerly KC Bot) search result page display relevance of returned results (omits description and highlighted query matches)?

When the KC bot is configured to use Search in unified tab, it should show the returned record description the same way Google does in a browser search by highlighting query matches in the title and description. The Gainsight PX documentation shows as much when Search is in it’s separate tab: 

But if Search is in a unified tab then the query matches are not highlighted in the description for linked articles. A description is not visible if the return is from a Google integration. We integrated our Flair help documents using the Google integration service. The screenshot below is how the results show (notice the lack of relevance):

We have other search queries that look more confusing and not at all insightful when the query string doesn't show in any of the results:

Same search query in Google search:

The search results page in KC bot needs to show a description and highlight the query string when it is found in the description. Without this we can not show the user why the results are relevant and makes for a bad experience. We cannot adopt this KC bot design with this flaw, and the unified tab design is the one that works for our product.

Why doesn't the KC bot search result page display relevance of the returned results?

Please advise.