Comment 6 for bug 2004632

If you use cloud-init, then a drop-in disable-sshd-keygen-if-cloud-init-active.conf will be placed to prevent ssh creating keys and race with cloud-init.
If you then disable cloud-init, but the drop-in is still there, you won't have any process taking care of ssh keys because cloud-init is disabled and sshd is stopped because of the drop-in.