Please take a look at https://issues.redhat.com/browse/MGMT-19629 which I cannot move due to attachement.

TLDR

It seems that the validation for HostedCluster spec.services[0].servicePublishingStrategy.nodePort.address IPv6 does not work correctly. Providing valid IPv6 address gets rejected.

How reproducible:

    always

Steps to Reproduce:

    1. Set IPv6 address to HostedCluster spec.services[0].servicePublishingStrategy.nodePort.address 
    2. submit
    

Actual results:

    backend rejects the HosterCluster resource saying that the field is not valid

Expected results:

       HostedCluster resource is accepted