Control planes missing 'member-of' labels

After adding a namespace member to a 2nd control-plane, Kiali in that 2nd control-plane does not display the namespace member in the namespace list (i.e. namespace list is empty even tough the namespace member was added).

This has been reproduced on two OCP4/AWS clusters using the following steps:
1) Create new Openshift projects (test1, test2)
2) Deploy control-plane1 in istio-system1
3) Deploy control-plane2 inistio-system2
4) Add test1 namespace member to istio-system1
Validate via Kiali (istio-system1) that test1 namespace is in the namespaceselection list
5) Add test2 namespace member to istio-system2
Validate via Kiali (istio-system2) that test2 namespace is in the namespace selection list - this works fine

• • • This last step fails in that Kiali does not display test2 in the namespace selection list*

Example member-role yaml:
apiVersion: maistra.io/v1
kind: ServiceMeshMemberRoll
metadata:
name: test2
spec:
members:

• test2

The Member Role is present:
oc get ServiceMeshMemberRoll -n istio-system2
NAME AGE
test2 39s