OpenShift upgrade from 4.2.16 to 4.2.18 failed/stalled at 88%

Issue

• Attempted upgrade from 4.2.16 to 4.2.18 and the upgrade is stuck at 88%

$oc get co
NAME                                       VERSION   AVAILABLE   PROGRESSING   DEGRADED   SINCE
authentication                             4.2.18    True        False         False      65m
cloud-credential                           4.2.18    True        False         False      35d
cluster-autoscaler                         4.2.18    True        False         False      35d
console                                    4.2.18    False       False         False      39m
dns                                        4.2.18    True        True          False      8d
image-registry                             4.2.18    True        False         False      38m
ingress                                    4.2.18    True        False         False      8d
insights                                   4.2.18    True        False         False      35d
kube-apiserver                             4.2.18    True        False         False      35d
kube-controller-manager                    4.2.18    True        False         False      35d
kube-scheduler                             4.2.18    True        False         False      35d
machine-api                                4.2.18    True        False         False      35d
machine-config                             4.2.18    False       False         True       27m
marketplace                                4.2.18    True        False         False      40m
monitoring                                 4.2.18    False       True          True       35m
network                                    4.2.18    True        True          False      35d
node-tuning                                4.2.18    True        False         False      44m
openshift-apiserver                        4.2.18    True        False         False      42m
openshift-controller-manager               4.2.18    True        False         False      8d
openshift-samples                          4.2.18    True        False         False      67m
operator-lifecycle-manager                 4.2.18    True        False         False      35d
operator-lifecycle-manager-catalog         4.2.18    True        False         False      35d
operator-lifecycle-manager-packageserver   4.2.18    True        False         False      38m
service-ca                                 4.2.18    True        True          False      35d
service-catalog-apiserver                  4.2.18    True        False         False      35d
service-catalog-controller-manager         4.2.18    True        False         False      35d
storage                                    4.2.18    True        False         False      66m