diff --git a/addons/mail/models/res_partner.py b/addons/mail/models/res_partner.py
index 165d99c4fe5..6edb1893dac 100644
--- a/addons/mail/models/res_partner.py
+++ b/addons/mail/models/res_partner.py
@@ -75,6 +75,11 @@ class Partner(models.Model):
     # ------------------------------------------------------------
     # ORM
     # ------------------------------------------------------------
+    @api.model
+    def _get_view_cache_key(self, view_id=None, view_type='form', **options):
+        """Add context variable force_email in the key as _get_view depends on it."""
+        key = super()._get_view_cache_key(view_id, view_type, **options)
+        return key + (self._context.get('force_email'),)
 
     @api.model
     @api.returns('self', lambda value: value.id)