Try and do one reboot at the end

ignition/base.bu

@@ -46,18 +46,17 @@ systemd:
       enabled: true
       contents: |
         [Unit]
-        Description=Enable SSH after configuration
+        Description=Enable SSH after configuration and reboot
         After=zincati.service
         ConditionPathExists=!/var/lib/%N.stamp
 
         [Service]
         Type=oneshot
         RemainAfterExit=yes
-        ExecStart=/usr/bin/systemctl start sshd
         ExecStart=/usr/bin/systemctl enable sshd
         ExecStart=/usr/bin/touch /var/lib/%N.stamp
         ExecStart=/usr/bin/rm /etc/issue.d/35-ssh-blocked.issue
-        ExecStart=/usr/bin/systemctl restart getty@tty1
+        ExecStart=/usr/bin/systemctl --no-block reboot
 
         [Install]
         WantedBy=multi-user.target
@@ -78,7 +77,6 @@ systemd:
         RemainAfterExit=yes
         ExecStart=/usr/bin/rpm-ostree install qemu-guest-agent
         ExecStart=/usr/bin/touch /var/lib/%N.stamp
-        ExecStart=/usr/bin/systemctl --no-block reboot
 
         [Install]
         WantedBy=multi-user.target