Facet pretty path providing no result I have used commerce kickstart and created product display page with facet filter.I have used Facet API Pretty Paths module to use simple URL.But it makes no result behaviour.Without facet pretty path, facet filter working good, but URL makes quite complex.
Unfortunately this is a bug in Facet API Pretty Paths module. 
take a look at https://www.drupal.org/node/2423029 and ask maintainer to solve or suggest a solution for it.