Hey @moebis,
Are you using custom WooCommerce templates and functions? If so, please remove all of them and give us details of the issues you’re experiencing because we need to know if X / Pro is causing the issues. Please also remove all third party plugins. If that could not be done in your live site, please copy your site over to a staging server and test there.
The version compatibility list is currently not up to date. We’re sorry about that.
If that doesn’t help, please open a separate thread and give us WP Admin and FTP access to your staging site in a Secure Note. Also post a link to this thread for reference.
Thanks.