HA upgrade - status Disconnected

Hello,

I'm in a process of upgrading my HA pair from 11.6 to 12.1. I've already upgraded the Standby unit, but now the status shows as Disconnected and I wonder if this is expected? Will they become 'synced' again once they're both on the same version?

Failover worked without issues after the upgrade so now I'm ready to upgrade the remaining unit.

Thanks,

Lucas