Thanks for the heads up! It may be that the filtered query yields no results and I'm showing a blank page instead of a message. I need to add a nice info message like "No results – please remove some filters" or something along these lines to make it clearer.
Try with a common query word like "cat" – filters work fine for me with all models!
Try with a common query word like "cat" – filters work fine for me with all models!