metal3-image-customization pod fails with read-only filesystem error on OpenShift 4.20.11 and later versions

Issue

• The metal3-image-customization pod in the openshift-machine-api namespace enters a CrashLoopBackOff state.

> oc get pod -n openshift-machine-api | grep CrashLoopBackOff
metal3-image-customization-7x94922-4pac9           0/1     Init:CrashLoopBackOff   7          15m

> oc logs metal3-image-customization-7x94922-4pac9
2026-02-03T22:56:58.908736543Z /bin/copy-metal: line 43: /coreos/coreos-aarch64.iso.sha256: Read-only file system

• The issue is observed on OpenShift Container Platform versions 4.20.11 and later.