diff --git a/addons/web/static/src/js/data.js b/addons/web/static/src/js/data.js
index 38119c63d3a..636ad575f99 100644
--- a/addons/web/static/src/js/data.js
+++ b/addons/web/static/src/js/data.js
@@ -764,7 +764,7 @@ openerp.web.BufferedDataSet = openerp.web.DataSetStatic.extend({
                         self.cache.push({id: id, values: record});
                     } else {
                         // I assume cache value is prioritary
-                        _.defaults(cached.values, record);
+                    	cached.values = _.defaults(_.clone(cached.values), record);
                     }
                 });
                 return_records();
diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index ff0ef5e5fea..8c9b99a02a2 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -2394,13 +2394,13 @@ openerp.web.form.FieldOne2Many = openerp.web.form.Field.extend({
                         obj['id'] = _.uniqueId(self.dataset.virtual_id_prefix);
                         obj.defaults = {};
                         self.dataset.to_create.push(obj);
-                        self.dataset.cache.push(_.clone(obj));
+                        self.dataset.cache.push(_.extend(_.clone(obj), {values: _.clone(command[2])}));
                         ids.push(obj.id);
                         return;
                     case commands.UPDATE:
                         obj['id'] = command[1];
                         self.dataset.to_write.push(obj);
-                        self.dataset.cache.push(_.clone(obj));
+                        self.dataset.cache.push(_.extend(_.clone(obj), {values: _.clone(command[2])}));
                         ids.push(obj.id);
                         return;
                     case commands.DELETE: