cluster.ping seems to only return the kv service info

When starting my tests, I've been doing a cluster.ping, passing in the bucket name, and waiting until all kv nodes reported ok.   Now that I'm doing query tests, I do a ping like this:

cluster.ping({}, "default", {service_type::key_value, service_type::query}, [&](couchbase::diag::ping_report){ ... }); 

The ping report only has key_value service data in it.   Same if I pass in no bucket name, and/or an empty set of services, and/or an empty report_id..