This bug was fixed in the package ubiquity - 19.04.4
--------------- ubiquity (19.04.4) disco; urgency=medium
* When installing non-free packages, also iterate and install any apt-installed marked packages which may include non-free drivers detected by ubuntu-drivers. LP: #1793671
-- Dimitri John Ledkov <email address hidden> Thu, 20 Dec 2018 11:22:12 +1100
This bug was fixed in the package ubiquity - 19.04.4
---------------
ubiquity (19.04.4) disco; urgency=medium
* When installing non-free packages, also iterate and install any
apt-installed marked packages which may include non-free drivers
detected by ubuntu-drivers. LP: #1793671
-- Dimitri John Ledkov <email address hidden> Thu, 20 Dec 2018 11:22:12 +1100