@pavloos Please have a look at this commit K8SPXC-876 use PublishNotReadyAddresses instead of annotation · percona/percona-xtradb-cluster-operator@808ce22 · GitHub
This issue was fixed for 1.10.0. As a workaround you can edit service kubectl edit svc/${clustername}-pxc-unready manually and add publishNotReadyAddresses: true to the spec.