REST API endpoint /pools/default/nodeServices returns no services

I have two node cluster installed (Community Edition 7.1.1 build 3175 on Windows) with data, index and query service installed.

However, when calling the REST API endpoint /pools/default/nodeServices, the list of services is empty - see the response below:

rev :106
nodesExt : {@{services=; thisNode=True; hostname=}, @{services=; hostname=}}
clusterCapabilitiesVer : {1, 0}
clusterCapabilities : @{n1ql=System.Object}
revEpoch : 1

Is it a bug or is there anything I am overlooking?