diff --git a/addons/website/models/website.py b/addons/website/models/website.py
index 270a6199c95..610f198d4d6 100644
--- a/addons/website/models/website.py
+++ b/addons/website/models/website.py
@@ -134,7 +134,7 @@ class Website(models.Model):
 
     def _compute_menu(self):
         for website in self:
-            menus = self.env['website.menu'].search([('website_id', '=', website.id)])
+            menus = self.env['website.menu'].browse(website._get_menu_ids())
 
             # use field parent_id (1 query) to determine field child_id (2 queries by level)"
             for menu in menus:
@@ -146,6 +146,11 @@ class Website(models.Model):
 
             website.menu_id = menus and menus.filtered(lambda m: not m.parent_id)[0].id or False
 
+    # self.env.uid for ir.rule groups on menu
+    @tools.ormcache('self.env.uid', 'self.id')
+    def _get_menu_ids(self):
+        return self.env['website.menu'].search([('website_id', '=', self.id)]).ids
+
     @api.model
     def create(self, vals):
         self._handle_favicon(vals)
diff --git a/addons/website/models/website_menu.py b/addons/website/models/website_menu.py
index bed9fb8cf26..88e48ca82e0 100644
--- a/addons/website/models/website_menu.py
+++ b/addons/website/models/website_menu.py
@@ -68,6 +68,7 @@ class Menu(models.Model):
                   Be careful to return correct record for ir.model.data xml_id in case
                   of default main menus creation.
         '''
+        self.clear_caches()
         # Only used when creating website_data.xml default menu
         if vals.get('url') == '/default-main-menu':
             return super(Menu, self).create(vals)
@@ -91,7 +92,14 @@ class Menu(models.Model):
                 res = super(Menu, self).create(vals)
         return res  # Only one record is returned but multiple could have been created
 
+    def write(self, values):
+        res = super().write(values)
+        if 'website_id' in values:
+            self.clear_caches()
+        return res
+
     def unlink(self):
+        self.clear_caches()
         default_menu = self.env.ref('website.main_menu', raise_if_not_found=False)
         menus_to_remove = self
         for menu in self.filtered(lambda m: default_menu and m.parent_id.id == default_menu.id):