Finally, after tests, regions filter cache is removed

app/views/layouts/application.html.haml

@@ -20,8 +20,7 @@
   - sub = request.domain ? request.domain.split('.')[0] : ''
   %body{ class: [sub, controller_name, action_name] }
     %header.top
-      - cache "regions_filter_#{session[:region]}" do
-        = render '/regions/filter'
+      = render '/regions/filter'
       = image_tag 'baby_gnu_adl.png', alt: '', class: :logo
       = render '/orgas/search'