@damnsharp Unfortunately not because I have no idea what your problem is.
I will try to help you, but I need some extra things from you:
1. Does enabling “Incorrect Mode” in plugin settings fix the problem?
2. Screenshot of your search results (entire browser window).
3. SQL query displayed after change in plugin code (https://gbiorczyk.pl/img/8jYkbzF.png) when you try to search for something.
4. ID of post you want to find.
5. Screenshot of the edit page of the post you want to find.
6. Database dump (only table wp_posts and wp_postmeta tables). Please delete private data from it, if any.
7. Screenshot of the plugin settings page.