I still get the issue with the latest version of ubuntu/focal64 (several
versions checked: 20210803.0.0, 20210802.1.0, 20210624.0.0):
$ vagrant up
Bringing machine 'default' up with 'virtualbox' provider...
==> default: Importing base box 'ubuntu/focal64'...
==> default: Matching MAC address for N
Public bug reported:
Binary package hint: ubiquity
Testing the ubuntu-11.04-beta1-desktop-amd64.iso I noticed
(inadvertently) that there are 4 desktops, and so the installer can
simply disappear from the view of the user. I wasn't inside the live
desktop but direct in the "standalone" installer,