Storage operators are typically running only one replica and they could flip-flop between Progressing:True and Progressing:False also Available: False and Available:True during upgrade.

Usually this settles down, but this is causing our CI to report poor signal on vSphere platform - https://prow.ci.openshift.org/job-history/gs/test-platform-results/logs/periodic-ci-openshift-release-master-ci-4.16-upgrade-from-stable-4.15-e2e-vsphere-ovn-upgrade