Harmony Hub and HA-bridge 4.5.6

Has anyone been able to get their Harmony Hub to discover the HA Bridge?

I can’t seem to get it working although the other way around works very well. From reading old threads I understand that it at least used to work…

It works here - make sure you set “UPNP IP Address” in HA Bridge config.

Weird - today I suddenly got it working after changing the UPnP port number from 40000 to 50000. Nothing is using 40000 but I tried anyway.
However my Amazon Echo will intermittently show all the bridge devices as offline…