Hi,
Thank you for the details. I have checked the configuration, and found probably a few issues, that I think was causing problems for you:
– I have enabled the “Select all options” for the filters: https://i.imgur.com/RjbaUCC.png
– I have aslo enabled the index table engine, for much faster search queries: https://i.imgur.com/01KBnV9.png
– I have disabled the plugin to return taxonomy terms as results, to only show the products: https://i.imgur.com/94eQI1N.png
Now, you should only see products as results, with a much faster search.