Azure Devops MS-hosted agent IP address

Question

We use Azure DevOps with Microsoft-hosted agents and would like to apply authorized IP ranges for our AKS we need the agent IP addresses. To automate the process in our release pipeline we have included the Azure CLI task with the command :

AGENT_IP=$(curl -s https://ipinfo.io/json | jq -r .ip)

az aks update --resource-group xxx --name yyy --api-server-authorized-ip-ranges ${AGENT_IP}

All the AGENT_IPs, we are getting from the command line, are not listed in the weekly json file. Even the operation is executed successfully and the AGENT_IP is included in the "apiServerAccessProfile.authorizedIpRanges" section, sometimes we are not able to deploy our microservice to the AKS and we are getting an error: "Unable to connect to the server: dial tcp xx.xx.xx.xx:443: i/o timeout". However, sometimes the deployment is successful, even though the AGENT_IP is not listed in the weekly json.

Why the IP addresses I am getting, are not in the weekly JSON file? Randomly I am able to deploy to AKS?