Problem with URL

Hi, i have upgrade wordpress and woocommerce today.

Now i have a problem with the url of the filter:
http://www.lasupergomma.com/pa_larghezza/205/?pa_altezza=205+55&pa_diametro=205+55+16&pa_indice-di-carico=205+55+16&pa_tipo=205+55+16&pa_marca=205+55+16

IT is reapeting in every fields the value. bur it is incorrect, i need:
http://www.lasupergomma.com/pa_larghezza/205/?pa_altezza=55&pa_diametro=16

How i can fix ?

https://wordpress.org/plugins/search-filter/