The cache didn't invalidate as expected

pretix_public_registrations/signals.py

@@ -46,9 +46,6 @@ def add_public_registration_question(sender, position, **kwargs):
 
 @receiver(signal=front_page_bottom, dispatch_uid="public_registrations_table")
 def add_public_registrations_table(sender, **kwargs):
-    cached = sender.cache.get('public_registrations_table_' + get_language())
-    if cached is None:
-        cached = ""
     public_questions = sender.questions.filter(pk__in=sender.settings.get('public_registrations_questions'))
     headers = (
         [_("Product")] if sender.settings.get('public_registrations_show_item_name') else []
@@ -83,12 +80,10 @@ def add_public_registrations_table(sender, **kwargs):
         } for pop in public_order_positions
     ]
     template = get_template('pretix_public_registrations/front_page.html')
-        cached = template.render({
+    return template.render({
         'headers': headers,
         'public_registrations': public_registrations
     })
-        sender.cache.set('public_registrations_table_' + get_language(), cached)
-    return cached
 
 
 @receiver(signal=process_response, dispatch_uid="public_registragions_csp_headers")