Attempting to deploy AKS fails with ERR 50

Running the following command:

az aks create -g {resource group name} -n {cluster name} --kubernetes-version 1.11.5 --subscription {subscription id} --node-count 2 --node-vm-size Standard_F2s_v2

Runs, but fails with error 50 on one of the setup containers.

However, when re-running the same command, everything works as expected.

Any ideas on what is failing?  This is new within the past 2-3 weeks, i think.