[ovirt-users] graphical console strange issue - certificate's owner does not match hostname - IP address (ovirt 4.5.6)

Dear proud RHV/Ovirt Hackers, facing strange issue with graphical console - do you have any tips? We successfully run many different clusters, most of them are similar (versions, hw setup). On single one of those, we are facing issue with opening graphical console: Many other clusters are the same setup, the same number of hypervisors, the same versions of OS, packages, ovirt-engine OS, versions and packages... ...and graphical console opens fine. The graphical console setup is the same at all places also: We did comparison of 'console-1.vv' content over many clusters and its content is totaly the same with the faulty one. Meaning there is never hostname, there is always an IP address (not hostname) as the "The certificate's owner does not match hostname 'IP-address'" says: Any tips howto fix this? Best regards Charles Stellen