{{actor.lastName}} directly in some of our i18n strings and it works perfectly to any actors who contain lastName. If it is not provided - the template code appears directly in the notifications.lastName in the object. Only after setting it to a single space we were able to remove the template appearing in the notifications, but storing a space there may be not the best thing as it can appear unexpectedly somewhere. Is there a better way to provide such empty variable or just not to show the template variable?