diff --git a/odoo/addons/base/models/assetsbundle.py b/odoo/addons/base/models/assetsbundle.py
index f28aa3539bf..63dc107c635 100644
--- a/odoo/addons/base/models/assetsbundle.py
+++ b/odoo/addons/base/models/assetsbundle.py
@@ -222,6 +222,18 @@ class AssetsBundle(object):
     def get_debug_asset_url(self, extra='', name='%', extension='%'):
         return f"/web/assets/debug/{extra}{name}{extension}"
 
+    def _unlink_attachments(self, attachments):
+        """ Unlinks attachments without actually calling unlink, so that the ORM cache is not cleared.
+
+        Specifically, if an attachment is generated while a view is rendered, clearing the ORM cache
+        could unload fields loaded with a sudo(), and expected to be readable by the view.
+        Such a view would be website.layout when main_object is an ir.ui.view.
+        """
+        to_delete = set(attach.store_fname for attach in attachments if attach.store_fname)
+        self.env.cr.execute(f"DELETE FROM {attachments._table} WHERE id IN %s", [tuple(attachments.ids)])
+        for file_path in to_delete:
+            attachments._file_delete(file_path)
+
     def clean_attachments(self, extension):
         """ Takes care of deleting any outdated ir.attachment records associated to a bundle before
         saving a fresh one.
@@ -248,7 +260,7 @@ class AssetsBundle(object):
         # avoid to invalidate cache if it's already empty (mainly useful for test)
 
         if attachments:
-            attachments.unlink()
+            self._unlink_attachments(attachments)
             # force bundle invalidation on other workers
             self.env['ir.qweb'].clear_caches()
 
@@ -591,7 +603,7 @@ class AssetsBundle(object):
                 compiled = self.run_rtlcss(compiled)
 
             if not self.css_errors and old_attachments:
-                old_attachments.unlink()
+                self._unlink_attachments(old_attachments)
                 old_attachments = None
 
             fragments = self.rx_css_split.split(compiled)
diff --git a/odoo/addons/base/models/ir_attachment.py b/odoo/addons/base/models/ir_attachment.py
index 815d0781ee4..50003009992 100644
--- a/odoo/addons/base/models/ir_attachment.py
+++ b/odoo/addons/base/models/ir_attachment.py
@@ -142,6 +142,7 @@ class IrAttachment(models.Model):
 
     def _mark_for_gc(self, fname):
         """ Add ``fname`` in a checklist for the filestore garbage collection. """
+        fname = re.sub('[.]', '', fname).strip('/\\')
         # we use a spooldir: add an empty file in the subdirectory 'checklist'
         full_path = os.path.join(self._full_path('checklist'), fname)
         if not os.path.exists(full_path):
diff --git a/odoo/addons/test_assetsbundle/tests/test_assetsbundle.py b/odoo/addons/test_assetsbundle/tests/test_assetsbundle.py
index 6ee0c60acad..35f43462db5 100644
--- a/odoo/addons/test_assetsbundle/tests/test_assetsbundle.py
+++ b/odoo/addons/test_assetsbundle/tests/test_assetsbundle.py
@@ -736,19 +736,19 @@ class TestAssetsBundleWithIRAMock(FileTouchable):
 
         # patch methods 'create' and 'unlink' of model 'ir.attachment'
         origin_create = IrAttachment.create
-        origin_unlink = IrAttachment.unlink
+        origin_unlink = AssetsBundle._unlink_attachments
 
         @api.model_create_multi
         def create(self, vals_list):
             counter.update(['create'] * len(vals_list))
             return origin_create(self, vals_list)
 
-        def unlink(self):
+        def unlink(self, attachments):
             counter.update(['unlink'])
-            return origin_unlink(self)
+            return origin_unlink(self, attachments)
 
         self.patch(IrAttachment, 'create', create)
-        self.patch(IrAttachment, 'unlink', unlink)
+        self.patch(AssetsBundle, '_unlink_attachments', unlink)
 
     def _get_asset(self):
         files, _ = self.env['ir.qweb']._get_asset_content(self.stylebundle_name)