is it a beta hard to tell from the module version 2.11.0
is placeorder called but that cant be found in any virto repo (https://github.com/search?q=org%3AVirtoCommerce+placeorder&type=Code) and is not listed in the manifest as an dependency
Thank you for your interest. We've made some changes in our cart api and will adjust cartServices.js very soon. This module is in beta right now. We are going to release this module next week.