Filters(Attributes) doesn’t work in shop page

Im trying to do a filter based on attributes using the widgets area. When i do click on the filters these appear in the URL as GET parameter correctly but the products list don’t affect by that. I did variable products as you can see in the screenshot.
In this example I marked blue term from the filter and doesn’t work, the image with the cross haven’t that term blue.

I need to do something else? Im using just woocommerce and a theme based on bootstrap blank 4 without more complements.

Thank you.