Problem disappeared installing Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171108) also disappeared similar bug: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1719191
Problem disappeared installing Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20171108) /bugs.launchpad .net/ubuntu/ +source/ ubiquity/ +bug/1719191
also disappeared similar bug: https:/