Unexpected warning from attempted failover for failed node

One of the VMs we use for our build_database nodes happened to be on a Xen host that had a fatal disk failure.  The configuration has 3 nodes and 2 replicas.  Attempting to do a failover from the failed node gave this warning:

Attention: There are not replica (backup) copies of all data on this node! Failing over the node now will irrecoverably lose that data when the incomplete replica is activated and this node is removed from the cluster. If the node might come back online, it is recommended to wait. Check this box if you want to failover the node, despite the resulting data loss.

Before replacing the node with a newly built one and rebalancing, cbcollect info was gathered from the two remaining nodes.  The data for each can be found here:

http://latestbuilds.service.couchbase.com/builds/latestbuilds/cbcollect/collectinfo-2018-05-15T021555-ns_1@172.23.106.53.zip

http://latestbuilds.service.couchbase.com/builds/latestbuilds/cbcollect/collectinfo-2018-05-15T021555-ns_1@172.23.120.12.zip

After putting a new 3rd node in place and rebalancing, there seemed to be no data loss (still verifying this by building out a new database from our manifests to see a document count), so the warning seems a bit surprising and may require some analysis for validity?