Note that this issue doesn't happen with official released image ubuntu-18.04-desktop-amd64.iso.
But does happen with daily build image http://cdimage.ubuntu.com/bionic/daily-live/pending/bionic-desktop-amd64.iso (For example, 20180508)
I think this issue is introduced between 2018-04-24 and 2018-04-30
Note that this issue doesn't happen with official released image ubuntu- 18.04-desktop- amd64.iso.
But does happen with daily build image http:// cdimage. ubuntu. com/bionic/ daily-live/ pending/ bionic- desktop- amd64.iso (For example, 20180508)
I think this issue is introduced between 2018-04-24 and 2018-04-30