I see. We have Relevanssi installed on the site, so it looks like that is overriding the results filters?
Would sending to a custom results page (rather than the default search results page) change that? I tried sending to this results page: https://www.fairfieldworld.com/custom-search/custom-results/
I set the “Custom redirect URL” setting to “custom-search/custom-results/”, but we get a Page not found error when doing a search on https://www.fairfieldworld.com/custom-search/