Category icon color does not show in search results

The icons show just fine in search results (via the dropdown search box), but they are grey instead of the category color.

In this example, the Public category is meant to be teal (Events are the subcategory):
The image displays a screenshot of a webpage with a search bar and some text.  (Captioned by AI)

You can see for yourself by doing that search (or similar) at ehealthforum.nz