Ah! I see what you are saying. Yes, in my example that is true. I skipped over this in the tutorial but you can just add any of your other nodes to the external load balancer to avoid this issue. For instance, in my setup I added both DO1 and DO2 to the load balancer.
Alex is CEO of Netmaker (https://netmaker.io), a cloud networking company building the next-gen virtual networking platform.