In the release notes available via this link there is an issue explained regarding Hyper-V Replica.

Hyper-V Replica

While configuring replication that uses certificate-based authentication on servers joined to a domain, if you provide a short name for the primary server while adding authorization entries, enabling replication will fail. To avoid this, identify servers using their fully qualified domain names.

While configuring replication on servers joined to a domain, if you provide a short name for the Replica server for certificate-based authentication, enabling replication will succeed, but the pre-requisite check prior to a planned failover will fail. To correct this, update the Replica server name with the following Windows PowerShell cmdlet:

Set-VMReplication -vmname "<Name of VM>" -recoveryservername "<FQDN of replica server>"