This can only be a bug if you can verify that your DHCP service process on your server is actually supplying the gateway address as part of it's DHCP response, and the empeg is not picking it up. It is not a required item in a DHCP response ( I would need to check the RFC to be sure about this, and it is also server implementation dependent).

Have you checked to see if the Gateway address is being supplied by your DHCP server?

One of the few remaining Mk1 owners... #00015