diff --git a/addons/website/models/ir_ui_view.py b/addons/website/models/ir_ui_view.py
index 84089d5c0c6..d3c6a55a6b7 100644
--- a/addons/website/models/ir_ui_view.py
+++ b/addons/website/models/ir_ui_view.py
@@ -51,11 +51,14 @@ class View(models.Model):
                     ], limit=1)
                     if not website_specific_view:
                         # Set key to avoid copy() to generate an unique key as we want the specific view to have the same key
-                        website_specific_view = view.copy({'website_id': current_website_id, 'key': view.key})
+                        copy_vals = {'website_id': current_website_id, 'key': view.key}
+                        if vals.get('inherit_id'):
+                            copy_vals['inherit_id'] = vals['inherit_id']
+                        website_specific_view = view.copy(copy_vals)
                         view._create_website_specific_pages_for_view(website_specific_view,
                                                                      view.env['website'].browse(current_website_id))
 
-                        for inherit_child in view.inherit_children_ids:
+                        for inherit_child in view.inherit_children_ids.filter_duplicate():
                             # COW won't be triggered if there is already a website_id on the view, we should copy the view ourself
                             if inherit_child.website_id.id == current_website_id:
                                 inherit_child.copy({'inherit_id': website_specific_view.id, 'key': inherit_child.key})
diff --git a/addons/website/tests/test_views.py b/addons/website/tests/test_views.py
index b16740ad619..5bbfbd07112 100644
--- a/addons/website/tests/test_views.py
+++ b/addons/website/tests/test_views.py
@@ -520,3 +520,43 @@ class TestCowViewSaving(common.TransactionCase):
         base_arch_w1 = self.base_view.with_context(website_id=1).read_combined(['arch'])['arch']
         self.assertEqual('Hello World' in base_arch, True)
         self.assertEqual(base_arch, base_arch_w1, "Reading a top level view with or without a website_id in the context should render that exact view..")  # ..even if there is a specific view for that one, as read_combined is supposed to render specific inherited view over generic but not specific top level instead of generic top level
+
+    def test_cow_cross_inherit(self):
+        View = self.env['ir.ui.view']
+        total_views = View.search_count([])
+
+        main_view = View.create({
+            'name': 'Main View',
+            'type': 'qweb',
+            'arch': '<body>GENERIC<div>A</div></body>',
+            'key': 'website.main_view',
+        }).with_context(load_all_views=True)
+
+        View.create({
+            'name': 'Child View',
+            'mode': 'extension',
+            'inherit_id': main_view.id,
+            'arch': '<xpath expr="//div" position="replace"><div>VIEW<p>B</p></div></xpath>',
+            'key': 'website.child_view',
+        })
+
+        child_view_2 = View.with_context(load_all_views=True).create({
+            'name': 'Child View 2',
+            'mode': 'extension',
+            'inherit_id': main_view.id,
+            'arch': '<xpath expr="//p" position="replace"><span>C</span></xpath>',
+            'key': 'website.child_view_2',
+        })
+
+        # These line doing `write()` are the real tests, it should not be changed and should not crash on xpath.
+        child_view_2.with_context(website_id=1).write({'arch': '<xpath expr="//p" position="replace"><span>D</span></xpath>'})
+        self.assertEqual(total_views + 3 + 1, View.search_count([]), "It should have created the 3 initial generic views and created a child_view_2 specific view")
+        main_view.with_context(website_id=1).write({'arch': '<body>SPECIFIC<div>Z</div></body>'})
+        self.assertEqual(total_views + 3 + 3, View.search_count([]), "It should have duplicated the Main View tree as a specific tree and then removed the specific view from the generic tree as no more needed")
+
+        generic_view = View.with_context(website_id=None).get_view_id('website.main_view')
+        specific_view = View.with_context(website_id=1).get_view_id('website.main_view')
+        generic_view_arch = View.browse(generic_view).with_context(load_all_views=True).read_combined(['arch'])['arch']
+        specific_view_arch = View.browse(specific_view).with_context(load_all_views=True, website_id=1).read_combined(['arch'])['arch']
+        self.assertEqual(generic_view_arch == '<body>GENERIC<div>VIEW<span>C</span></div></body>', True)
+        self.assertEqual(specific_view_arch == '<body>SPECIFIC<div>VIEW<span>D</span></div></body>', True, "Writing on top level view hierarchy with a website in context should write on the view and clone it's inherited views")