Istio v1.12 defaultNodeSelector not working

Upgrade from 1.9 to 1.12 and noticed that the global.values.defaultNodeSelector option is not applied to the istio Pods.

I can see the above setting in the istiooperator manifest but not in the istiod deployment or Pods:

Node-Selectors:              <none>

Is there another setting to apply this globally or should this work?