Recently our site began no longer returning correct search results. When searching it returns one result that’s unrelated to the inquiry. I’ve turned off all plugins and reverted back to a day when I thought it was working properly to no avail. What could possibly cause this to occur?

You can see in the image below that the result is not related to the inquiry.

Here’s an example of a page with the title and terms related to the inquiry.

The front end also returns inaccurate results