On searching for a profile (I have not tested for other entry types), clicking the back button from one search term back to the first will merge the results from the two.
Open Spotify Desktop
Use search bar to search for term (in my case, "John Casey").
Select "Profiles" from search results. This will bring you to all profiles tagged with "John Casey".
Using the search bar from the same page, start a new search with a new term, this time "Sarah Rowley"
From the main search results page, once again select "Profiles" to navigate you to the profiles page. This will show all profiles tagged "Sarah Rowley".
Click the back navigation button once. This will bring you to the previous page with all search result types for "Sarah Rowley".
Click the back navigation once more. This should bring you to a page with only "John Casey" tagged profile search results. Instead, this shows search results for profiles tagged with both "John Casey" as well as "Sarah Rowley", all mixed together in the same display area.