@Richard Hussong Posting as Answer so that it can reach broader audience.
Since the issue is more specific to Azure SDK and not ACI itself I was suggested to open Git issue where our internal team can have a look and help you further with the issue.
I have created a GitHub thread for you as below where you can share code snippet showing how you used the older SDK:
https://github.com/Azure/azure-sdk-for-js/issues/12900
Hope it helps!!!
Please "Accept as Answer" so it can help others in community looking for help on similar topics.