Revert "Fixed instant loading not triggering when going back to initial page"

This reverts commit 329d26d34a.

material/base.html

@@ -240,7 +240,7 @@
       </script>
     {% endblock %}
     {% block scripts %}
-      <script src="{{ 'assets/javascripts/bundle.56494524.min.js' | url }}"></script>
+      <script src="{{ 'assets/javascripts/bundle.4b2c34cd.min.js' | url }}"></script>
       {% for path in config.extra_javascript %}
         <script src="{{ path | url }}"></script>
       {% endfor %}

src/assets/javascripts/integrations/instant/index.ts

@@ -170,9 +170,10 @@ export function setupInstantLoading(
   /* Intercept history back and forward */
   const pop$ = fromEvent<PopStateEvent>(window, "popstate")
     .pipe(
+      filter(ev => ev.state !== null),
       map(ev => ({
         url: new URL(location.href),
-        offset: ev.state ?? {}
+        offset: ev.state
       })),
       share<HistoryState>()
     )