Hi,
Thank you for the details!
I have logged in and changed this option for you: https://i.imgur.com/ifiWZVh.png
By default the “unchecked” boxes mean exclusion, because in most cases they are checked by default. In your case you are looking to get results whenever a checkbox is checked, and for that this logic fits better.
You should be seeing the results from the selected taxonomy terms. Let me know!