No. I haven’t been combining the attribute filter with any other criteria.
Then basic colors like white, black and red must be custom product attributes since it can’t even search for these.
Somehow the plugin retrieves a list of my product colors from somewhere and shows them in the dropdown menu (select attributes…). The list of colors is not complete, but most of my product colors are on it. Yet, no matter which listed color I try, the search won’t find anything.