In a single-stack IPv6 environment cluster-kube-apiserver-operator needs to generate the correct config for kube-apiserver.
Tested in the ipv6 builds. Not currently QA-able.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:0581