With 4.14 agent based installer provisioned OCP cluster(using "openshift-install agent create image ..." generate agent iso), there should have ImageDigestMirrorSet resource instead of ImageContentSourcePolicy.

Red Hat is deprecating ICSP and have already made some efforts:
https://issues.redhat.com/browse/OCPNODE-1258
https://github.com/openshift/installer/pull/6235

But by viewing the code changes in this PR: https://github.com/openshift/installer/pull/6235
Seems like it only worked for this command: "openshift-install create cluster --dir install-dir/"    

4.14    

100%    

    1. Generate ISO
    2. Install cluster
    3. check for IDMS
    

ICSP is present but IDMS is missing   

IDMS should be present