This bug was fixed in the package isc-dhcp - 4.4.1-2.3ubuntu6
--------------- isc-dhcp (4.4.1-2.3ubuntu6) kinetic; urgency=medium
* Include /etc/dhcp/dhclient-exit-hooks.d/rfc3442-classless-routes in the initramfs. LP: #1937110.
-- Steve Langasek <email address hidden> Fri, 05 Aug 2022 23:58:14 +0000
This bug was fixed in the package isc-dhcp - 4.4.1-2.3ubuntu6
---------------
isc-dhcp (4.4.1-2.3ubuntu6) kinetic; urgency=medium
* Include /etc/dhcp/ dhclient- exit-hooks. d/rfc3442- classless- routes in the
initramfs. LP: #1937110.
-- Steve Langasek <email address hidden> Fri, 05 Aug 2022 23:58:14 +0000