When we apply MC which contains os extension after OCL is enabled, the changes are unable to detect. So for MC with wrong extension the node should be degraded but are not. 

    1. Enable OCL
    2. Apply below MC
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: worker
  name: change-workers-extension-usbguard
spec:
  config:
    ignition:
      version: 3.2.0
  extensions:
    - usbguard
    - zsh     
3. The nodes should degraded 

All nodes are updated without degrade or node does not contain the applied extension for correct MC applied. 

Node should be degraded with error
message: 'Node ip-10-0-31-7.us-east-2.compute.internal is reporting: "invalid extensions found: [zsh]"' reason: 1 nodes are reporting degraded status on sync